1173 + Interview Questions in Statistics Page 5 InterviewSolution

201.	1 bar = _____ Pa
Answer» 1 bar = _____ Pa

Discussion

202.	Write the equation that relates the profit earned (y) in years (x) through some games played.
Answer» Write the equation that relates the profit earned (y) in years (x) through some games played.

Discussion

203.	Which of the following is a multivariate polynomial?
Answer» Which of the following is a multivariate polynomial?

Discussion

204.	‘The Government and policy makers use statistical data to formulate suitable policies of economic development’. Illustrate with two examples.
Answer» ‘The Government and policy makers use statistical data to formulate suitable policies of economic development’. Illustrate with two examples.

Discussion

205.	Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data. 28,17,15,22,29,21,23,27,18,12,7,2,9,4,6,1,8,3,10,5,20,16,12,8,4,33,27,21,15,9,3,36,27,18,9,2,4,6,32,31,29,18,14,13,15,11,9,7,1,5,37,32,28,26,24,20,19,25,19,20
Answer» Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data. 28,17,15,22,29,21,23,27,18,12,7,2,9,4,6,1,8,3,10,5,20,16,12,8,4,33,27,21,15,9,3,36,27,18,9,2,4,6,32,31,29,18,14,13,15,11,9,7,1,5,37,32,28,26,24,20,19,25,19,20

Discussion

206.	Discuss simple average of price relative method.
Answer» Discuss simple average of price relative method.

Discussion

207.	Find the mean deviation from the median for the following data Xi74894254919435fi201224534
Answer» Find the mean deviation from the median for the following data $\begin{matrix} X_{i} & 74 & 89 & 42 & 54 & 91 & 94 & 35 f_{i} & 20 & 12 & 2 & 4 & 5 & 3 & 4 \end{matrix}$

Discussion

208.	In which method does the investigator collect the data personally?
Answer» In which method does the investigator collect the data personally?

Discussion

209.	What are the null points?Where can they be found?How are they created?
Answer» What are the null points?Where can they be found?How are they created?

Discussion

210.

Seven methods of teaching Economics in two universities are shown below. Calculate rank difference correlation. Teaching Methods I II III IV V VI VII Rank of 'A's Students 2 1 5 3 4 7 6 Rank of 'B's Students 1 3 2 4 7 5 6

Answer» Seven methods of teaching Economics in two universities are shown below. Calculate rank difference correlation.

Teaching Methods	I	II	III	IV	V	VI	VII
Rank of 'A's Students	2	1	5	3	4	7	6
Rank of 'B's Students	1	3	2	4	7	5	6

Discussion

211.	The domain and range of y = sinx is
Answer» The domain and range of y = sinx is

Discussion

212.	Find the inter quartile range, quartile deviation and coefficient of quartile deviation from the following data: Marks28182024273015
Answer» Find the inter quartile range, quartile deviation and coefficient of quartile deviation from the following data: $\begin{matrix} Marks & 28 & 18 & 20 & 24 & 27 & 30 & 15 \end{matrix}$

212.

Find the inter quartile range, quartile deviation and coefficient of quartile deviation from the following data: Marks28182024273015

Answer»

Find the inter quartile range, quartile deviation and coefficient of quartile deviation from the following data:

$\begin{matrix} Marks & 28 & 18 & 20 & 24 & 27 & 30 & 15 \end{matrix}$

Discussion

213.	The below table shows the profit made by a group of shops in mall. Then the median is Profit per shop less than (%)102030405060No. of shops1230577794100
Answer» The below table shows the profit made by a group of shops in mall. Then the median is $\begin{matrix} P r o f i t p e r s h o p l e s s t h a n (%) & 10 & 20 & 30 & 40 & 50 & 60 N o . o f s h o p s & 12 & 30 & 57 & 77 & 94 & 100 \end{matrix}$

213.

The below table shows the profit made by a group of shops in mall. Then the median is Profit per shop less than (%)102030405060No. of shops1230577794100

Answer»

The below table shows the profit made by a group of shops in mall. Then the median is

$\begin{matrix} P r o f i t p e r s h o p l e s s t h a n (%) & 10 & 20 & 30 & 40 & 50 & 60 N o . o f s h o p s & 12 & 30 & 57 & 77 & 94 & 100 \end{matrix}$

Discussion

214.	Fidnthe coefficient of variation for the following frequency distribution. Clasees0−3030−6060−9090−120120−150150−180180−210Frequency23510352 The sum and sum of squared corresponding to length x (in cm) and weight y (in g) of 50 plant products are given below. ∑50i=1xi=212,∑50i=1xi=x2i=902.8 and ∑50i=1yi=261, and ∑50i=1y2i=1457.6 Which is more varying, the length or weight?
Answer» Fidnthe coefficient of variation for the following frequency distribution. $\begin{matrix} Clasees & 0 - 30 & 30 - 60 & 60 - 90 & 90 - 120 & 120 - 150 & 150 - 180 & 180 - 210 Frequency & 2 & 3 & 5 & 10 & 3 & 5 & 2 \end{matrix}$ The sum and sum of squared corresponding to length x (in cm) and weight y (in g) of 50 plant products are given below. $\sum_{i = 1}^{50} x_{i} = 212, \sum_{i = 1}^{50} x_{i} = x_{i}^{2} = 902.8$ and $\sum_{i = 1}^{50} y_{i} = 261$ , and $\sum_{i = 1}^{50} y_{i}^{2} = 1457.6$ Which is more varying, the length or weight?

214.

Fidnthe coefficient of variation for the following frequency distribution. Clasees0−3030−6060−9090−120120−150150−180180−210Frequency23510352 The sum and sum of squared corresponding to length x (in cm) and weight y (in g) of 50 plant products are given below. ∑50i=1xi=212,∑50i=1xi=x2i=902.8 and ∑50i=1yi=261, and ∑50i=1y2i=1457.6 Which is more varying, the length or weight?

Answer»

Fidnthe coefficient of variation for the following frequency distribution.

$\begin{matrix} Clasees & 0 - 30 & 30 - 60 & 60 - 90 & 90 - 120 & 120 - 150 & 150 - 180 & 180 - 210 Frequency & 2 & 3 & 5 & 10 & 3 & 5 & 2 \end{matrix}$

The sum and sum of squared corresponding to length x (in cm) and weight y (in g) of 50 plant products are given below.
$\sum_{i = 1}^{50} x_{i} = 212, \sum_{i = 1}^{50} x_{i} = x_{i}^{2} = 902.8$ and $\sum_{i = 1}^{50} y_{i} = 261$ , and $\sum_{i = 1}^{50} y_{i}^{2} = 1457.6$

Which is more varying, the length or weight?

Discussion

215.	If n HM's are inserted between a & b, Harmonic mean of sequence formed is
Answer» If n HM's are inserted between a & b, Harmonic mean of sequence formed is

Discussion

216.	A ____ uses bars to show comparison of data.
Answer» A ____ uses bars to show comparison of data.

Discussion

217.	The number of chromosomes in somatic cells of Haplopappus is 4. So the number of chromosomes in the gamete cell will be = ?
Answer» The number of chromosomes in somatic cells of Haplopappus is 4. So the number of chromosomes in the gamete cell will be = ?

Discussion

218.	The number of orders received by a food delivery app for 8 consecutive days is as follows. 16, 20, 40, 50, 30, 60, 40, 80. Find the standard deviation about the mean.
Answer» The number of orders received by a food delivery app for 8 consecutive days is as follows. 16, 20, 40, 50, 30, 60, 40, 80. Find the standard deviation about the mean.

218.

The number of orders received by a food delivery app for 8 consecutive days is as follows. 16, 20, 40, 50, 30, 60, 40, 80. Find the standard deviation about the mean.

Answer»

The number of orders received by a food delivery app for 8 consecutive days is as follows.

16, 20, 40, 50, 30, 60, 40, 80.

Find the standard deviation about the mean.

Discussion

219.	Fig. 2.1 shows a relationship between the sets P and Q. Write this relation: (i) in set-builder form (ii) roster form What is its domain and range?
Answer» Fig. 2.1 shows a relationship between the sets P and Q. Write this relation: (i) in set-builder form (ii) roster form What is its domain and range?

219.

Fig. 2.1 shows a relationship between the sets P and Q. Write this relation: (i) in set-builder form (ii) roster form What is its domain and range?

Answer»

Fig. 2.1 shows a relationship between the sets P and Q. Write this relation:

(i) in set-builder form (ii) roster form

What is its domain and range?

Discussion

220.	Question 4The following table gives the number of pages written by Sarika for completing her own book for 30 days.Number of pages written per day16−1819−2122−2425−2728−30Number of days134913Find the mean number of pages written per day.
Answer» Question 4 The following table gives the number of pages written by Sarika for completing her own book for 30 days. $\begin{matrix} Number of pages written per day & 16 - 18 & 19 - 21 & 22 - 24 & 25 - 27 & 28 - 30 Number of days & 1 & 3 & 4 & 9 & 13 \end{matrix}$ Find the mean number of pages written per day.

Discussion

221.

Calculate mean deviation from mean of the following series: Size of Items 3−4 4−5 5−6 6−7 7−8 8−9 9−10 Frequency 3 7 22 60 85 32 9

Answer» Calculate mean deviation from mean of the following series:

Size of Items	3−4	4−5	5−6	6−7	7−8	8−9	9−10
Frequency	3	7	22	60	85	32	9

Discussion

222.	12,14,15,04,9,9,7,7,7,2,5,7,9,12,13. Find mean mode and median of this data and prove relationship between mean mode and median , mean-mode =3(mean-median)
Answer» 12,14,15,04,9,9,7,7,7,2,5,7,9,12,13. Find mean mode and median of this data and prove relationship between mean mode and median , mean-mode =3(mean-median)

Discussion

223.	What is the significance of village studies in the history of Indian sociology? What role did M.N. Srinivas play in promoting village studies?
Answer» What is the significance of village studies in the history of Indian sociology? What role did M.N. Srinivas play in promoting village studies?

Discussion

224.

Seven students of a class secured following marks in Economics and History. Calculate coefficient of correlation with the help of these data. Economics 66 90 89 55 58 44 42 History 58 76 65 58 53 49 56

Answer» Seven students of a class secured following marks in Economics and History. Calculate coefficient of correlation with the help of these data.

Economics	66	90	89	55	58	44	42
History	58	76	65	58	53	49	56

Discussion

225.	Give two examples of the situations where survey method can be used. What are the limitations of this method?
Answer» Give two examples of the situations where survey method can be used. What are the limitations of this method?

Discussion

226.	In the wholesale price index of India, highest weightage is given to______.
Answer» In the wholesale price index of India, highest weightage is given to______.

Discussion

227.

Find out median wage rate from the following data-set: Wage Rate (₹) 5−15 15−25 25−35 35−45 45−55 55−65 Number of Workers 4 6 10 5 3 2

Answer» Find out median wage rate from the following data-set:

Wage Rate (₹)	5−15	15−25	25−35	35−45	45−55	55−65
Number of Workers	4	6	10	5	3	2

Discussion

228.	The next Census of India will be taken in the year ___ .
Answer» The next Census of India will be taken in the year ___ .

Discussion

229.	What is meant by a product being perfectly homogeneous? What is ts implication for the price charged by producers in the market?
Answer» What is meant by a product being perfectly homogeneous? What is ts implication for the price charged by producers in the market?

Discussion

230.	Distinguish between explicit cost and implicit cost with examples.
Answer» Distinguish between explicit cost and implicit cost with examples.

Discussion

231.	Find the mean of the given data. Class intervalFrequency0−1007100−20011200−30015300−4009400−5008
Answer» Find the mean of the given data. $\begin{matrix} C l a s s i n t e r v a l & F r e q u e n c y 0 - 100 & 7 100 - 200 & 11 200 - 300 & 15 300 - 400 & 9 400 - 500 & 8 \end{matrix}$

Discussion

232.	The slope, M of the line of best fit for the bivariate frequency distribution in variables x and y is given by the formula
Answer» The slope, M of the line of best fit for the bivariate frequency distribution in variables x and y is given by the formula

Discussion

233.	Find the mean deviation about the mean for the following data: 15, 17, 10, 13, 7, 18, 9, 6, 14, 11
Answer» Find the mean deviation about the mean for the following data: 15, 17, 10, 13, 7, 18, 9, 6, 14, 11

233.

Find the mean deviation about the mean for the following data: 15, 17, 10, 13, 7, 18, 9, 6, 14, 11

Answer»

Find the mean deviation about the mean for the following data:

15, 17, 10, 13, 7, 18, 9, 6, 14, 11

Discussion

234.	Find the Range & co-efficient of the Range for the following data The heights of 10 children are 122, 144, 154, 101, 168, 118, 155, 133, 160, 140
Answer» Find the Range & co-efficient of the Range for the following data The heights of 10 children are 122, 144, 154, 101, 168, 118, 155, 133, 160, 140

Discussion

235.

Plot the anuual profits of a firm on a time series graph: Year 2012 2013 2014 2015 2016 2017 Profit ('000 ₹) 60 72 75 65 80 95

Answer» Plot the anuual profits of a firm on a time series graph:

Year	2012	2013	2014	2015	2016	2017
Profit ('000 ₹)	60	72	75	65	80	95

Discussion

236.

Calculate arithmetic mean from the following data by Short-cut Method: Class Interval 20−25 25−30 30−35 35−40 40−45 45−50 50−55 Frequency 10 12 8 20 11 4 5

Answer» Calculate arithmetic mean from the following data by Short-cut Method:

Class Interval	20−25	25−30	30−35	35−40	40−45	45−50	50−55
Frequency	10	12	8	20	11	4	5

Discussion

237.

Nine students of a class obtained following marks. Calculate mean deviation from median. S. No. 1 2 3 4 5 6 7 8 9 Marks 68 49 32 21 54 38 59 66 41

Answer» Nine students of a class obtained following marks. Calculate mean deviation from median.

S. No.	1	2	3	4	5	6	7	8	9
Marks	68	49	32	21	54	38	59	66	41

Discussion

238.	If the standard deviation of a variable X is σ, then the S.D. of the variable aX+bc, where a, b, c are constants,is __________________.
Answer» If the standard deviation of a variable X is σ, then the S.D. of the variable $\frac{a X + b}{c}$ , where a, b, c are constants,is __________________.

Discussion

239.

Present the following data by a deviation bar diagram, showing the difference between sale proceeds and costs of a firm. Year Sale Proceeds (₹ in lakh) Costs (₹ in lakh) 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 115 140 145 150 160 170 100 115 155 140 145 165

Answer» Present the following data by a deviation bar diagram, showing the difference between sale proceeds and costs of a firm.

Year	Sale Proceeds (₹ in lakh)	Costs (₹ in lakh)
2011-12 2012-13 2013-14 2014-15 2015-16 2016-17	115 140 145 150 160 170	100 115 155 140 145 165

Discussion

240.	Differentiate between an interview and a questionnaire.
Answer» Differentiate between an interview and a questionnaire.

Discussion

241.	What is the advantage of creating natural numbers from whole numbers as there is only a small Difference
Answer» What is the advantage of creating natural numbers from whole numbers as there is only a small Difference

Discussion

242.	Can the CPI number for urban non-manual employees represent the changes in the cost of living of the President of India?
Answer» Can the CPI number for urban non-manual employees represent the changes in the cost of living of the President of India?

Discussion

243.

What is meant by ogive or cumulative frequency curve? From the following distribution construct the 'less than' ogive: Capital (in lakh) 0−10 10−20 20−30 30−40 40−50 50−60 60−70 Number of Companies 2 3 7 11 15 7 23

Answer» What is meant by ogive or cumulative frequency curve? From the following distribution construct the 'less than' ogive:

Capital (in lakh)	0−10	10−20	20−30	30−40	40−50	50−60	60−70
Number of Companies	2	3	7	11	15	7	23

Discussion

244.	The mean deviation of the data 2, 9, 9, 3, 6, 9, 4 from the mean is (a) 2.23 (b) 2.57 (c) 3.23 (d) 3.57
Answer» The mean deviation of the data 2, 9, 9, 3, 6, 9, 4 from the mean is (a) 2.23 (b) 2.57 (c) 3.23 (d) 3.57

Discussion

245.	The number of ways in which the letters of the word TRIANGLE can be arranged such that two vowels do not occur together is
Answer» The number of ways in which the letters of the word TRIANGLE can be arranged such that two vowels do not occur together is

Discussion

246.	Can simple correlation coefficient measure any type of relationship?
Answer» Can simple correlation coefficient measure any type of relationship?

Discussion

247.	If the median and mode of the data 8, 7, x, 5, 4, 4, y, z, 5, 5, 6, 7, 8 are x and y respectively. If both z, y > x, then the value of (x + y + z) cannot be equal to
Answer» If the median and mode of the data 8, 7, x, 5, 4, 4, y, z, 5, 5, 6, 7, 8 are x and y respectively. If both z, y > x, then the value of (x + y + z) cannot be equal to

Discussion

248.	Why is the study of the origin and growth of sociology important?
Answer» Why is the study of the origin and growth of sociology important?

Discussion

249.	Unlimited human wants and limited resources lead to ___ .
Answer» Unlimited human wants and limited resources lead to ___ .

Discussion

250.

Find out range and coefficient of range of the following series. Size5−1010−1515−2020−2525−30Frequency4983040

Answer»

Find out range and coefficient of range of the following series.

$\begin{matrix} Size & 5 - 10 & 10 - 15 & 15 - 20 & 20 - 25 & 25 - 30 Frequency & 4 & 9 & 8 & 30 & 40 \end{matrix}$

Discussion

Explore topic-wise InterviewSolutions in .

1 bar = _____ Pa

Write the equation that relates the profit earned (y) in years (x) through some games played.

Which of the following is a multivariate polynomial?

‘The Government and policy makers use statistical data to formulate suitable policies of economic development’. Illustrate with two examples.

Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data. 28,17,15,22,29,21,23,27,18,12,7,2,9,4,6,1,8,3,10,5,20,16,12,8,4,33,27,21,15,9,3,36,27,18,9,2,4,6,32,31,29,18,14,13,15,11,9,7,1,5,37,32,28,26,24,20,19,25,19,20

Discuss simple average of price relative method.

Find the mean deviation from the median for the following data Xi74894254919435fi201224534

In which method does the investigator collect the data personally?

What are the null points?Where can they be found?How are they created?

Seven methods of teaching Economics in two universities are shown below. Calculate rank difference correlation. Teaching Methods I II III IV V VI VII Rank of 'A's Students 2 1 5 3 4 7 6 Rank of 'B's Students 1 3 2 4 7 5 6

The domain and range of y = sinx is

Find the inter quartile range, quartile deviation and coefficient of quartile deviation from the following data: Marks28182024273015

The below table shows the profit made by a group of shops in mall. Then the median is Profit per shop less than (%)102030405060No. of shops1230577794100

If n HM's are inserted between a &amp; b, Harmonic mean of sequence formed is

A ____ uses bars to show comparison of data.

The number of chromosomes in somatic cells of Haplopappus is 4. So the number of chromosomes in the gamete cell will be = ?

The number of orders received by a food delivery app for 8 consecutive days is as follows. 16, 20, 40, 50, 30, 60, 40, 80. Find the standard deviation about the mean.

Fig. 2.1 shows a relationship between the sets P and Q. Write this relation: (i) in set-builder form (ii) roster form What is its domain and range?

Question 4The following table gives the number of pages written by Sarika for completing her own book for 30 days.Number of pages written per day16−1819−2122−2425−2728−30Number of days134913Find the mean number of pages written per day.

Calculate mean deviation from mean of the following series: Size of Items 3−4 4−5 5−6 6−7 7−8 8−9 9−10 Frequency 3 7 22 60 85 32 9

12,14,15,04,9,9,7,7,7,2,5,7,9,12,13. Find mean mode and median of this data and prove relationship between mean mode and median , mean-mode =3(mean-median)

What is the significance of village studies in the history of Indian sociology? What role did M.N. Srinivas play in promoting village studies?

Seven students of a class secured following marks in Economics and History. Calculate coefficient of correlation with the help of these data. Economics 66 90 89 55 58 44 42 History 58 76 65 58 53 49 56

Give two examples of the situations where survey method can be used. What are the limitations of this method?

In the wholesale price index of India, highest weightage is given to______.

Find out median wage rate from the following data-set: Wage Rate (₹) 5−15 15−25 25−35 35−45 45−55 55−65 Number of Workers 4 6 10 5 3 2

The next Census of India will be taken in the year ___ .

What is meant by a product being perfectly homogeneous? What is ts implication for the price charged by producers in the market?

Distinguish between explicit cost and implicit cost with examples.

Find the mean of the given data. Class intervalFrequency0−1007100−20011200−30015300−4009400−5008

The slope, M of the line of best fit for the bivariate frequency distribution in variables x and y is given by the formula

Find the mean deviation about the mean for the following data: 15, 17, 10, 13, 7, 18, 9, 6, 14, 11

Find the Range & co-efficient of the Range for the following data The heights of 10 children are 122, 144, 154, 101, 168, 118, 155, 133, 160, 140

Plot the anuual profits of a firm on a time series graph: Year 2012 2013 2014 2015 2016 2017 Profit ('000 ₹) 60 72 75 65 80 95

Calculate arithmetic mean from the following data by Short-cut Method: Class Interval 20−25 25−30 30−35 35−40 40−45 45−50 50−55 Frequency 10 12 8 20 11 4 5

Nine students of a class obtained following marks. Calculate mean deviation from median. S. No. 1 2 3 4 5 6 7 8 9 Marks 68 49 32 21 54 38 59 66 41

If the standard deviation of a variable X is σ, then the S.D. of the variable aX+bc, where a, b, c are constants,is __________________.

Present the following data by a deviation bar diagram, showing the difference between sale proceeds and costs of a firm. Year Sale Proceeds (₹ in lakh) Costs (₹ in lakh) 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 115 140 145 150 160 170 100 115 155 140 145 165

Differentiate between an interview and a questionnaire.

What is the advantage of creating natural numbers from whole numbers as there is only a small Difference

Can the CPI number for urban non-manual employees represent the changes in the cost of living of the President of India?

What is meant by ogive or cumulative frequency curve? From the following distribution construct the 'less than' ogive: Capital (in lakh) 0−10 10−20 20−30 30−40 40−50 50−60 60−70 Number of Companies 2 3 7 11 15 7 23

The mean deviation of the data 2, 9, 9, 3, 6, 9, 4 from the mean is (a) 2.23 (b) 2.57 (c) 3.23 (d) 3.57

The number of ways in which the letters of the word TRIANGLE can be arranged such that two vowels do not occur together is

Can simple correlation coefficient measure any type of relationship?

If the median and mode of the data 8, 7, x, 5, 4, 4, y, z, 5, 5, 6, 7, 8 are x and y respectively. If both z, y > x, then the value of (x + y + z) cannot be equal to

Why is the study of the origin and growth of sociology important?

Unlimited human wants and limited resources lead to ___ .

Find out range and coefficient of range of the following series. Size5−1010−1515−2020−2525−30Frequency4983040

If n HM's are inserted between a & b, Harmonic mean of sequence formed is