1173 + Interview Questions in Statistics Page 6 InterviewSolution

251.	Prepare a list of statistical information that you will facilitate comparison of academic performance of your school with others in your neighbourhood.
Answer» Prepare a list of statistical information that you will facilitate comparison of academic performance of your school with others in your neighbourhood.

Discussion

252.	The following is the trial balance of Manju Chawla on 31st March, 2016. You are required to prepare trading and profit and loss account and a balance sheet as on date. Name of AccountDebit (Rs.)Credit (Rs.)Opening Stock 10,000 −Purchases and Sales40,00080,000Returns 200 600Productive Wages 6,000 −Dock and Clearing Charges 4,000 −Donation and Charity 600 −Delivery Van Expenses 6,000 −Lighting 500 −Sales Tax Collected − 1,000Bad Debts 600 −Miscellaneous Incomes − 6,000Rent from Tenants − 2,000Royalty 4,000 −Capital − 40,000Drawings 2,000 −Debtors and Creditors 6,000 7,000Cash 3,000 −Investment 6,000 −Patents 4,000 −Land and Machinery43,000 − Closing stock Rs. 2,000.
Answer» The following is the trial balance of Manju Chawla on 31st March, 2016. You are required to prepare trading and profit and loss account and a balance sheet as on date. $\begin{matrix} Name of Account & Debit (Rs.) & Credit (Rs.) Opening Stock & 10, 000 & - Purchases and Sales & 40, 000 & 80, 000 Returns & 200 & 600 Productive Wages & 6, 000 & - Dock and Clearing Charges & 4, 000 & - Donation and Charity & 600 & - Delivery Van Expenses & 6, 000 & - Lighting & 500 & - Sales Tax Collected & - & 1, 000 Bad Debts & 600 & - Miscellaneous Incomes & - & 6, 000 Rent from Tenants & - & 2, 000 Royalty & 4, 000 & - Capital & - & 40, 000 Drawings & 2, 000 & - Debtors and Creditors & 6, 000 & 7, 000 Cash & 3, 000 & - Investment & 6, 000 & - Patents & 4, 000 & - Land and Machinery & 43, 000 & - \end{matrix}$ Closing stock Rs. 2,000.

252.

The following is the trial balance of Manju Chawla on 31st March, 2016. You are required to prepare trading and profit and loss account and a balance sheet as on date. Name of AccountDebit (Rs.)Credit (Rs.)Opening Stock 10,000 −Purchases and Sales40,00080,000Returns 200 600Productive Wages 6,000 −Dock and Clearing Charges 4,000 −Donation and Charity 600 −Delivery Van Expenses 6,000 −Lighting 500 −Sales Tax Collected − 1,000Bad Debts 600 −Miscellaneous Incomes − 6,000Rent from Tenants − 2,000Royalty 4,000 −Capital − 40,000Drawings 2,000 −Debtors and Creditors 6,000 7,000Cash 3,000 −Investment 6,000 −Patents 4,000 −Land and Machinery43,000 − Closing stock Rs. 2,000.

Answer»

The following is the trial balance of Manju Chawla on 31st March, 2016. You are required to prepare trading and profit and loss account and a balance sheet as on date.

$\begin{matrix} Name of Account & Debit (Rs.) & Credit (Rs.) Opening Stock & 10, 000 & - Purchases and Sales & 40, 000 & 80, 000 Returns & 200 & 600 Productive Wages & 6, 000 & - Dock and Clearing Charges & 4, 000 & - Donation and Charity & 600 & - Delivery Van Expenses & 6, 000 & - Lighting & 500 & - Sales Tax Collected & - & 1, 000 Bad Debts & 600 & - Miscellaneous Incomes & - & 6, 000 Rent from Tenants & - & 2, 000 Royalty & 4, 000 & - Capital & - & 40, 000 Drawings & 2, 000 & - Debtors and Creditors & 6, 000 & 7, 000 Cash & 3, 000 & - Investment & 6, 000 & - Patents & 4, 000 & - Land and Machinery & 43, 000 & - \end{matrix}$

Closing stock Rs. 2,000.

Discussion

253.	If precisely measured data are available the simple correlation coefficient is(i) more accurate than rank correlation coefficient(ii) less accurate than rank correlation coefficient(iii) as accurate as the rank correlation coefficient
Answer» If precisely measured data are available the simple correlation coefficient is (i) more accurate than rank correlation coefficient (ii) less accurate than rank correlation coefficient (iii) as accurate as the rank correlation coefficient

253.

If precisely measured data are available the simple correlation coefficient is(i) more accurate than rank correlation coefficient(ii) less accurate than rank correlation coefficient(iii) as accurate as the rank correlation coefficient

Answer»

If precisely measured data are available the simple correlation coefficient is

(i) more accurate than rank correlation coefficient

(ii) less accurate than rank correlation coefficient

(iii) as accurate as the rank correlation coefficient

Discussion

254.	Change the following into continuous series : Mid-value51525354555Frequency1624301884
Answer» Change the following into continuous series : $\begin{matrix} Mid-value & 5 & 15 & 25 & 35 & 45 & 55 Frequency & 16 & 24 & 30 & 18 & 8 & 4 \end{matrix}$

254.

Change the following into continuous series : Mid-value51525354555Frequency1624301884

Answer»

Change the following into continuous series :

$\begin{matrix} Mid-value & 5 & 15 & 25 & 35 & 45 & 55 Frequency & 16 & 24 & 30 & 18 & 8 & 4 \end{matrix}$

Discussion

255.	If the mean of the observation : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of last three observation is (a) 313(b) 323(c) 343(d) 353
Answer» If the mean of the observation : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of last three observation is $(a) \frac{31}{3} (b) \frac{32}{3} (c) \frac{34}{3} (d) \frac{35}{3}$

Discussion

256.	Which of the following defines mean deviation?
Answer» Which of the following defines mean deviation?

Discussion

257.	Find the variance and standard deviation for the following data: xi1015182025fi32582
Answer» Find the variance and standard deviation for the following data: $\begin{matrix} x_{i} & 10 & 15 & 18 & 20 & 25 f_{i} & 3 & 2 & 5 & 8 & 2 \end{matrix}$

257.

Find the variance and standard deviation for the following data: xi1015182025fi32582

Answer»

Find the variance and standard deviation for the following data:

$\begin{matrix} x_{i} & 10 & 15 & 18 & 20 & 25 f_{i} & 3 & 2 & 5 & 8 & 2 \end{matrix}$

Discussion

258.	Wheat plant is 6n = 42. What will be the number of chromosomes in its monosomic, haploid and monoploid?
Answer» Wheat plant is 6n = 42. What will be the number of chromosomes in its monosomic, haploid and monoploid?

Discussion

259.	Calculate the mean deviation about median age for the age distribution of 100 persons given below : Age 16−20 21−25 26−30 31−35 36−40 41−45 46−50 51−55 Number 5 6 12 14 26 12 16 9
Answer» Calculate the mean deviation about median age for the age distribution of 100 persons given below : $\begin{matrix} Age & 16 - 20 & 21 - 25 & 26 - 30 & 31 - 35 & 36 - 40 & 41 - 45 & 46 - 50 & 51 - 55 Number & 5 & 6 & 12 & 14 & 26 & 12 & 16 & 9 \end{matrix}$

259.

Calculate the mean deviation about median age for the age distribution of 100 persons given below : Age 16−20 21−25 26−30 31−35 36−40 41−45 46−50 51−55 Number 5 6 12 14 26 12 16 9

Answer»

Calculate the mean deviation about median age for the age distribution of 100 persons given below :

$\begin{matrix} Age & 16 - 20 & 21 - 25 & 26 - 30 & 31 - 35 & 36 - 40 & 41 - 45 & 46 - 50 & 51 - 55 Number & 5 & 6 & 12 & 14 & 26 & 12 & 16 & 9 \end{matrix}$

Discussion

260.	Data represented through arithmetic line graph help in understanding(i) long-term trend(ii) cyclicity in data(iii) seasonality in data(iv) all the above
Answer» Data represented through arithmetic line graph help in understanding (i) long-term trend (ii) cyclicity in data (iii) seasonality in data (iv) all the above

260.

Data represented through arithmetic line graph help in understanding(i) long-term trend(ii) cyclicity in data(iii) seasonality in data(iv) all the above

Answer»

Data represented through arithmetic line graph help in understanding

(i) long-term trend

(ii) cyclicity in data

(iii) seasonality in data

(iv) all the above

Discussion

261.	(I) The change in any price is reflected in an index number. (II) The wholesale price index can be used to measure the monetary and real value of national income and expenditure.
Answer» (I) The change in any price is reflected in an index number. (II) The wholesale price index can be used to measure the monetary and real value of national income and expenditure.

261.

(I) The change in any price is reflected in an index number. (II) The wholesale price index can be used to measure the monetary and real value of national income and expenditure.

Answer»

(I) The change in any price is reflected in an index number.

(II) The wholesale price index can be used to measure the monetary and real value of national income and expenditure.

Discussion

262.	Consider the following statements: 1. WPI measure price rise at the wholesale level where wholesale means sale in large quantities and meant for resale. 2.Producer Price Index means the prices of goods as they are sold to the whole sales by the producers. 3. The price of electricity in the CPI is the Industrial tariff & not the consumer tariff. Response:
Answer» Consider the following statements: 1. WPI measure price rise at the wholesale level where wholesale means sale in large quantities and meant for resale. 2.Producer Price Index means the prices of goods as they are sold to the whole sales by the producers. 3. The price of electricity in the CPI is the Industrial tariff & not the consumer tariff. Response:

262.

Consider the following statements: 1. WPI measure price rise at the wholesale level where wholesale means sale in large quantities and meant for resale. 2.Producer Price Index means the prices of goods as they are sold to the whole sales by the producers. 3. The price of electricity in the CPI is the Industrial tariff & not the consumer tariff. Response:

Answer»

Consider the following statements:

1. WPI measure price rise at the wholesale level where wholesale means sale in large quantities and meant for resale.

2.Producer Price Index means the prices of goods as they are sold to the whole sales by the producers.

3. The price of electricity in the CPI is the Industrial tariff & not the consumer tariff.

Response:

Discussion

263.	Question 2Calculate the mean of the scores of 20 students in a mathematics testMarks10−2020−3030−4040−5050−60Number of students24761
Answer» Question 2 Calculate the mean of the scores of 20 students in a mathematics test $\begin{matrix} Marks & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 Number of students & 2 & 4 & 7 & 6 & 1 \end{matrix}$

Discussion

264.	How many quartiles are there in a series?
Answer» How many quartiles are there in a series?

Discussion

265.	Draw a histogram of the following data: Age (in years)0−1010−2020−3030−4040−5050−7070−100No. of Persons5151822353015
Answer» Draw a histogram of the following data: $\begin{matrix} Age (in years) & 0 - 10 & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 70 & 70 - 100 No. of Persons & 5 & 15 & 18 & 22 & 35 & 30 & 15 \end{matrix}$

Discussion

266.	33. If X follows a binomial distribution with parameters n=100 and p= 1/3, then P(X=r) is maximum when r =
Answer» 33. If X follows a binomial distribution with parameters n=100 and p= 1/3, then P(X=r) is maximum when r =

Discussion

267.	If the median of the following data is 50, then find p. Class0-2020-4040-6060-8080-100Frequency10716p8
Answer» If the median of the following data is 50, then find p. $\begin{matrix} C l a s s & 0-20 & 20-40 & 40-60 & 60-80 & 80-100 F r e q u e n c y & 10 & 7 & 16 & p & 8 \end{matrix}$

267.

If the median of the following data is 50, then find p. Class0-2020-4040-6060-8080-100Frequency10716p8

Answer»

If the median of the following data is 50, then find p.

$\begin{matrix} C l a s s & 0-20 & 20-40 & 40-60 & 60-80 & 80-100 F r e q u e n c y & 10 & 7 & 16 & p & 8 \end{matrix}$

Discussion

268.	Which Venn diagram shows correct relationship between Doctors, Hospitals and Graduates?निम्नलिखित में से कौनसा वेन आरेख चिकित्सक, अस्पताल तथा स्नातक के मध्य सही सम्बन्ध को दर्शाता है?
Answer» Which Venn diagram shows correct relationship between Doctors, Hospitals and Graduates? निम्नलिखित में से कौनसा वेन आरेख चिकित्सक, अस्पताल तथा स्नातक के मध्य सही सम्बन्ध को दर्शाता है?

Discussion

269.

Find the mean deviationabout the mean for the data Height in cms Number of boys 95-105 9 105-115 13 115-125 26 125-135 30 135-145 12 145-155 10

Answer»

Find the mean deviation
about the mean for the data

Height in cms	Number of boys
95-105	9
105-115	13
115-125	26
125-135	30
135-145	12
145-155	10

Discussion

270.	How can we demonstrate that the different dimensions of culture comprise a whole?
Answer» How can we demonstrate that the different dimensions of culture comprise a whole?

Discussion

271.	What are the qualities of a good questionnaire?
Answer» What are the qualities of a good questionnaire?

Discussion

272.	State whether the following statements are True or False.(i) There are many sources of data(ii) Telephone survey is the most suitable method of collecting data, when the population is literate and spread over a large area.(iii) Data collected by investigator is called the secondary data.(iv) There is a certain bias involved in the non-random selection of samples.(iv) Non-sampling errors can be minimised by taking large samples.
Answer» State whether the following statements are True or False. (i) There are many sources of data (ii) Telephone survey is the most suitable method of collecting data, when the population is literate and spread over a large area. (iii) Data collected by investigator is called the secondary data. (iv) There is a certain bias involved in the non-random selection of samples. (iv) Non-sampling errors can be minimised by taking large samples.

Discussion

273.	How did Ananthakrishna Iyer and Sarat Chandra Roy come to practice social anthropology?
Answer» How did Ananthakrishna Iyer and Sarat Chandra Roy come to practice social anthropology?

Discussion

274.	Find out range and coefficient of range from the following data Marks20−2930−3940−4950−5960−69Number of Students8122073
Answer» Find out range and coefficient of range from the following data $\begin{matrix} Marks & 20 - 29 & 30 - 39 & 40 - 49 & 50 - 59 & 60 - 69 Number of Students & 8 & 12 & 20 & 7 & 3 \end{matrix}$

274.

Find out range and coefficient of range from the following data Marks20−2930−3940−4950−5960−69Number of Students8122073

Answer»

Find out range and coefficient of range from the following data

$\begin{matrix} Marks & 20 - 29 & 30 - 39 & 40 - 49 & 50 - 59 & 60 - 69 Number of Students & 8 & 12 & 20 & 7 & 3 \end{matrix}$

Discussion

275.	The ratio of tensions in the strings connected to the block of mass m2 in figure - (a) and figure-(b) respectively is (friction is absent everywhere) Given: [m1= 50 kg, m2 = 80kg and F = 1000 N].
Answer» The ratio of tensions in the strings connected to the block of mass $m_{2}$ in figure - (a) and figure-(b) respectively is (friction is absent everywhere) Given: [ $m_{1}$ = 50 kg, $m_{2}$ = 80kg and F = 1000 N].

275.

The ratio of tensions in the strings connected to the block of mass m2 in figure - (a) and figure-(b) respectively is (friction is absent everywhere) Given: [m1= 50 kg, m2 = 80kg and F = 1000 N].

Answer»

The ratio of tensions in the strings connected to the block of mass $m_{2}$ in figure - (a) and figure-(b) respectively is (friction is absent everywhere) Given: [ $m_{1}$ = 50 kg, $m_{2}$ = 80kg and F = 1000 N].

Discussion

276.	Question 7 In which of the following cases, do the quantities vary directly with each other? (a)x0.52832y2832128 (b)p12223242q13233343 (c)r25102550s2510520.5 (d)u246912v189643
Answer» Question 7 In which of the following cases, do the quantities vary directly with each other? $(a) \begin{matrix} x & 0.5 & 2 & 8 & 32 y & 2 & 8 & 32 & 128 \end{matrix}$ $(b) \begin{matrix} p & 1^{2} & 2^{2} & 3^{2} & 4^{2} q & 1^{3} & 2^{3} & 3^{3} & 4^{3} \end{matrix}$ $(c) \begin{matrix} r & 2 & 5 & 10 & 25 & 50 s & 25 & 10 & 5 & 2 & 0.5 \end{matrix}$ $(d) \begin{matrix} u & 2 & 4 & 6 & 9 & 12 v & 18 & 9 & 6 & 4 & 3 \end{matrix}$

276.

Question 7 In which of the following cases, do the quantities vary directly with each other? (a)x0.52832y2832128 (b)p12223242q13233343 (c)r25102550s2510520.5 (d)u246912v189643

Answer»

Question 7

In which of the following cases, do the quantities vary directly with each other?
$(a) \begin{matrix} x & 0.5 & 2 & 8 & 32 y & 2 & 8 & 32 & 128 \end{matrix}$
$(b) \begin{matrix} p & 1^{2} & 2^{2} & 3^{2} & 4^{2} q & 1^{3} & 2^{3} & 3^{3} & 4^{3} \end{matrix}$
$(c) \begin{matrix} r & 2 & 5 & 10 & 25 & 50 s & 25 & 10 & 5 & 2 & 0.5 \end{matrix}$
$(d) \begin{matrix} u & 2 & 4 & 6 & 9 & 12 v & 18 & 9 & 6 & 4 & 3 \end{matrix}$

Discussion

277.	Distinguish between random sampling and non-random sampling.
Answer» Distinguish between random sampling and non-random sampling.

277.

Distinguish between random sampling and non-random sampling.

Answer»

Distinguish between random sampling and non-random sampling.

Discussion

278.	In a music contest, 3 judges X, Y, and Z give scores out of 10. The scores of 4 contestants are as follows. Find which judges disagree with each other the most? ContestantsXYZC11078C2794C3685C48109
Answer» In a music contest, 3 judges X, Y, and Z give scores out of 10. The scores of 4 contestants are as follows. Find which judges disagree with each other the most? $\begin{matrix} C o n t e s t a n t s & X & Y & Z C_{1} & 10 & 7 & 8 C_{2} & 7 & 9 & 4 C_{3} & 6 & 8 & 5 C_{4} & 8 & 10 & 9 \end{matrix}$

Discussion

279.	The item having the highest weight in consumer price index for industrial workers is (i) food (ii) housing (iii) clothing
Answer» The item having the highest weight in consumer price index for industrial workers is (i) food (ii) housing (iii) clothing

279.

The item having the highest weight in consumer price index for industrial workers is (i) food (ii) housing (iii) clothing

Answer»

The item having the highest weight in consumer price index for industrial workers is

(i) food

(ii) housing

(iii) clothing

Discussion

280.	Ramesh travelled 300km by train and 200km by taxi, it took him 5h30min.But if he travels 260km by train and 240km by taxi he takes 6min longer. Find the speed of the train and that of taxi.
Answer» Ramesh travelled 300km by train and 200km by taxi, it took him 5h30min.But if he travels 260km by train and 240km by taxi he takes 6min longer. Find the speed of the train and that of taxi.

Discussion

281.	The mean of 25 observations is 36. Out of these observations if the mean of first 13 observations is 32 and that the last 13 observations is 40, the 13th observations is (a) 23(b) 36(c) 38(d) 40
Answer» The mean of 25 observations is 36. Out of these observations if the mean of first 13 observations is 32 and that the last 13 observations is 40, the 13^th observations is (a) 23 (b) 36 (c) 38 (d) 40

Discussion

282.

From the following data, relating to playing habits in various age group of 900 students. Calculate coefficient of correlation between age group and playing habits. Age Group 15−16 16−17 17−18 18−19 19−20 20−21 Number of Students 250 200 150 120 100 80 Regular Players 200 150 90 48 30 12

Answer» From the following data, relating to playing habits in various age group of 900 students. Calculate coefficient of correlation between age group and playing habits.

Age Group	15−16	16−17	17−18	18−19	19−20	20−21
Number of Students	250	200	150	120	100	80
Regular Players	200	150	90	48	30	12

Discussion

283.	Question 7Consider the following frequency distributionClass0.56−1112−1718−2324−29Frequency131015811The upper limit of the median class is(a) 17(b) 17.5(c) 18(d) 18.5
Answer» Question 7 Consider the following frequency distribution $\begin{matrix} C l a s s & 0.5 & 6 - 11 & 12 - 17 & 18 - 23 & 24 - 29 F r e q u e n c y & 13 & 10 & 15 & 8 & 11 \end{matrix}$ The upper limit of the median class is (a) 17 (b) 17.5 (c) 18 (d) 18.5

Discussion

284.	A batsman is to be selected for a cricket team. The choice is between X and Y on the basis of their five previous scores which are: X25854080120Y5070654580 (a) Calculate coefficient of standard deviation, variance and coefficient of variation. (b) Which batsman should be selected if we want: (i) A high run scorer, (ii) A more reliable batsman in the team.
Answer» A batsman is to be selected for a cricket team. The choice is between X and Y on the basis of their five previous scores which are: $\begin{matrix} X & 25 & 85 & 40 & 80 & 120 Y & 50 & 70 & 65 & 45 & 80 \end{matrix}$ (a) Calculate coefficient of standard deviation, variance and coefficient of variation. (b) Which batsman should be selected if we want: (i) A high run scorer, (ii) A more reliable batsman in the team.

Discussion

285.	Find the equation of locus of }P, if }A=(4,0),B=(-4,0) and }\vert PA-PB\vert=4
Answer» Find the equation of locus of }P, if }A=(4,0),B=(-4,0) and }\vert PA-PB\vert=4

Discussion

286.	How will you define dispersion?
Answer» How will you define dispersion?

Discussion

287.	The following data gives the placement statistics for a college. The annual salaries of 100 students (in lakhs) are tabulated along with the number of students in each salary bracket. Find the quartile deviation of the data to the nearest integer. Salary Bracket(in lpa)0−55−1010−1515−2020−2525−30No. of students382420963
Answer» The following data gives the placement statistics for a college. The annual salaries of 100 students (in lakhs) are tabulated along with the number of students in each salary bracket. Find the quartile deviation of the data to the nearest integer. $\begin{matrix} S a l a r y B r a c k e t (i n l p a) & 0 - 5 & 5 - 10 & 10 - 15 & 15 - 20 & 20 - 25 & 25 - 30 N o . o f s t u d e n t s & 38 & 24 & 20 & 9 & 6 & 3 \end{matrix}$

Discussion

288.

Following data relate to the age-difference of husbands and wives of a particular community. Find out mean deviation from mean. Age-difference 0−5 5−10 10−15 15−20 20−25 25−30 30−35 35−40 Frequency 449 705 507 281 109 52 16 4

Answer» Following data relate to the age-difference of husbands and wives of a particular community. Find out mean deviation from mean.

Age-difference	0−5	5−10	10−15	15−20	20−25	25−30	30−35	35−40
Frequency	449	705	507	281	109	52	16	4

Discussion

289.

Distribution of marks obtained by 100 students of a class is given below. Find out the median marks. Marks 0 5 10 15 20 25 30 35 40 45 Number of Students 4 6 15 5 8 12 28 14 3 5

Answer» Distribution of marks obtained by 100 students of a class is given below. Find out the median marks.

Marks	0	5	10	15	20	25	30	35	40	45
Number of Students	4	6	15	5	8	12	28	14	3	5

Discussion

290.	The minimum value of (x−6)2+(x+3)2+(x−8)2+(x+4)2+(x−3)2 is
Answer» The minimum value of $(x - 6)^{2} + (x + 3)^{2} + (x - 8)^{2} + (x + 4)^{2} + (x - 3)^{2}$ is

Discussion

291.	What are the stages of Statistical Study?
Answer» What are the stages of Statistical Study?

Discussion

292.

Read the following table carefully and give your comments. INDEX OF INDUSTRIAL PRODUCTION BASE 1993 – 94 Industry Weight (in %) 1996 – 97 2003 – 2004 General Index Mining and Quarrying Manufacturing Electricity 100 10.73 79.58 10.69 130.8 118.2 133.6 122.0 189.0 146.9 196.6 172.6

Answer»

Read the following table carefully and give your comments.

INDEX OF INDUSTRIAL PRODUCTION BASE 1993 – 94

Industry

Weight (in %)

1996 – 97

2003 – 2004

General Index

Mining and Quarrying

Manufacturing

Electricity

100

10.73

79.58

10.69

130.8

118.2

133.6

122.0

189.0

146.9

196.6

172.6

Discussion

293.	What is a sample in statistics? What are the essential features of a good sample?
Answer» What is a sample in statistics? What are the essential features of a good sample?

Discussion

294.	Does zero correlation mean independence?
Answer» Does zero correlation mean independence?

Discussion

295.

Find out median of the following series: Wage Rate (₹) 25−30 20−25 15−20 10−15 5−10 0−5 Number of Workers 5 10 20 5 8 2

Answer» Find out median of the following series:

Wage Rate (₹)	25−30	20−25	15−20	10−15	5−10	0−5
Number of Workers	5	10	20	5	8	2

Discussion

296.

Calculate coefficient of correlation of the following data: X 10 6 9 10 12 13 11 9 Y 9 4 6 9 11 13 8 4

Answer» Calculate coefficient of correlation of the following data:

X	10	6	9	10	12	13	11	9
Y	9	4	6	9	11	13	8	4

Discussion

297.

How are equilibrium price and quantity affected when the income of the consumers (a) increase (b) decrease?

Answer»

How are equilibrium price and quantity affected when the income of the consumers

(a) increase

(b) decrease?

Discussion

298.	A worker currently earns a dearness allowance of Rs.10,100 per year and his dearness allowance in the base year of 1985 is Rs.1,300 per year. What should be the hike in his dearness allowance in order to maintain the same standard of living with time if the WPI today is 780?
Answer» A worker currently earns a dearness allowance of Rs.10,100 per year and his dearness allowance in the base year of 1985 is Rs.1,300 per year. What should be the hike in his dearness allowance in order to maintain the same standard of living with time if the WPI today is 780?

Discussion

299.	What is the difference between a price index and a quantity index?
Answer» What is the difference between a price index and a quantity index?

Discussion

300.	The impact of change in the price of a commodity with little weight in the index will be____.
Answer» The impact of change in the price of a commodity with little weight in the index will be____.

Discussion

Explore topic-wise InterviewSolutions in .

Prepare a list of statistical information that you will facilitate comparison of academic performance of your school with others in your neighbourhood.

If precisely measured data are available the simple correlation coefficient is(i) more accurate than rank correlation coefficient(ii) less accurate than rank correlation coefficient(iii) as accurate as the rank correlation coefficient

Change the following into continuous series : Mid-value51525354555Frequency1624301884

If the mean of the observation : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of last three observation is (a) 313(b) 323(c) 343(d) 353

Which of the following defines mean deviation?

Find the variance and standard deviation for the following data: xi1015182025fi32582

Wheat plant is 6n = 42. What will be the number of chromosomes in its monosomic, haploid and monoploid?

Calculate the mean deviation about median age for the age distribution of 100 persons given below : Age 16−20 21−25 26−30 31−35 36−40 41−45 46−50 51−55 Number 5 6 12 14 26 12 16 9

Data represented through arithmetic line graph help in understanding(i) long-term trend(ii) cyclicity in data(iii) seasonality in data(iv) all the above

(I) The change in any price is reflected in an index number. (II) The wholesale price index can be used to measure the monetary and real value of national income and expenditure.

Question 2Calculate the mean of the scores of 20 students in a mathematics testMarks10−2020−3030−4040−5050−60Number of students24761

How many quartiles are there in a series?

Draw a histogram of the following data: Age (in years)0−1010−2020−3030−4040−5050−7070−100No. of Persons5151822353015

33. If X follows a binomial distribution with parameters n=100 and p= 1/3, then P(X=r) is maximum when r =

If the median of the following data is 50, then find p. Class0-2020-4040-6060-8080-100Frequency10716p8

Find the mean deviationabout the mean for the data Height in cms Number of boys 95-105 9 105-115 13 115-125 26 125-135 30 135-145 12 145-155 10

How can we demonstrate that the different dimensions of culture comprise a whole?

What are the qualities of a good questionnaire?

How did Ananthakrishna Iyer and Sarat Chandra Roy come to practice social anthropology?

Find out range and coefficient of range from the following data Marks20−2930−3940−4950−5960−69Number of Students8122073

The ratio of tensions in the strings connected to the block of mass m2 in figure - (a) and figure-(b) respectively is (friction is absent everywhere) Given: [m1= 50 kg, m2 = 80kg and F = 1000 N].

Question 7 In which of the following cases, do the quantities vary directly with each other? (a)x0.52832y2832128 (b)p12223242q13233343 (c)r25102550s2510520.5 (d)u246912v189643

Distinguish between random sampling and non-random sampling.

In a music contest, 3 judges X, Y, and Z give scores out of 10. The scores of 4 contestants are as follows. Find which judges disagree with each other the most? ContestantsXYZC11078C2794C3685C48109

The item having the highest weight in consumer price index for industrial workers is (i) food (ii) housing (iii) clothing

Ramesh travelled 300km by train and 200km by taxi, it took him 5h30min.But if he travels 260km by train and 240km by taxi he takes 6min longer. Find the speed of the train and that of taxi.

The mean of 25 observations is 36. Out of these observations if the mean of first 13 observations is 32 and that the last 13 observations is 40, the 13th observations is (a) 23(b) 36(c) 38(d) 40

Question 7Consider the following frequency distributionClass0.56−1112−1718−2324−29Frequency131015811The upper limit of the median class is(a) 17(b) 17.5(c) 18(d) 18.5

Find the equation of locus of }P, if }A=(4,0),B=(-4,0) and }\vert PA-PB\vert=4

How will you define dispersion?

Following data relate to the age-difference of husbands and wives of a particular community. Find out mean deviation from mean. Age-difference 0−5 5−10 10−15 15−20 20−25 25−30 30−35 35−40 Frequency 449 705 507 281 109 52 16 4

Distribution of marks obtained by 100 students of a class is given below. Find out the median marks. Marks 0 5 10 15 20 25 30 35 40 45 Number of Students 4 6 15 5 8 12 28 14 3 5

The minimum value of (x−6)2+(x+3)2+(x−8)2+(x+4)2+(x−3)2 is

What are the stages of Statistical Study?

Read the following table carefully and give your comments. INDEX OF INDUSTRIAL PRODUCTION BASE 1993 – 94 Industry Weight (in %) 1996 – 97 2003 – 2004 General Index Mining and Quarrying Manufacturing Electricity 100 10.73 79.58 10.69 130.8 118.2 133.6 122.0 189.0 146.9 196.6 172.6

What is a sample in statistics? What are the essential features of a good sample?

Does zero correlation mean independence?

Find out median of the following series: Wage Rate (₹) 25−30 20−25 15−20 10−15 5−10 0−5 Number of Workers 5 10 20 5 8 2

Calculate coefficient of correlation of the following data: X 10 6 9 10 12 13 11 9 Y 9 4 6 9 11 13 8 4

How are equilibrium price and quantity affected when the income of the consumers (a) increase (b) decrease?

A worker currently earns a dearness allowance of Rs.10,100 per year and his dearness allowance in the base year of 1985 is Rs.1,300 per year. What should be the hike in his dearness allowance in order to maintain the same standard of living with time if the WPI today is 780?

What is the difference between a price index and a quantity index?

The impact of change in the price of a commodity with little weight in the index will be____.