Related InterviewSolutions

• In what way is the bar graph better than the pictograph ?
• For which of these would you use a histogram to show the data: (a) The number of letters for different areas in a postman’s bag. (b) The height of competitors in an athletics meet. (c) The number cassettes produced by 5 companies. (d) The number of passengers boarding trains from 7.00 a.m. to 7.00 p.m. at a station. Give reason for each.
• Using the following data, construct a frequency distribution table : 46, 44, 42, 54, 52, 60, 50, 58, 56, 62, 50, 56, 54, 58 and 48.Now answer the following :(i) What is the range of the numbers?(ii) How many numbers are greater than 50?(iii) How many numbers are between 40 and 50?
• If the ratio of mode and median is 7 : 4, then find the ratio of mean and mode is:(a) 7 : 11 (b) 2 : 3 (c) 5 : 14 (d) 8 : 9
• If the range of observation 7x, 5x, 3x, 2x, x (x > 0) is 12, then find value of ‘x’ and express all the observations in numerical form.
• If the median of \(\frac{x}{6},\) \(\frac{x}{2},\) \(\frac{x}{4},\) \(\frac{3x}{5}\) and \(\frac{7x}{10}\) is 3, then the mean of the given observations is : (a) 2.5 (b) 3.06 (c) 2.16 (d) 2.66
• Let \(\overline{x}\) be the mean of n observations x1 , x2 , x3 ,...xn. If (a – b) is added to each observation, then what is the mean of the new set of observations?(a) zero (b) \(\overline{x}\) (c) \(\overline{x}\) – (a – b) (d) \(\overline{x}\) + (a – b)
• In a class of 19 students, seven boys failed in a test. Those who passed scored 12, 15,17, 15, 16, 15, 19, 19, 17, 18, 18 and 19 marks. The median score of the 19 students in the class is (a) 15 (b) 16 (c) 17 (d) 18
• A data set of n observations has mean 2\(\overline{x}\) while another data set of 2n observations has mean \(\overline{x}\).The mean of the combined data set of 3n observations will be equal to:(a) \(\overline{x}\)(b) \(\frac{3}{2}\)\(\overline{x}\)(c)  \(\frac{2}{3}\)\(\overline{x}\)(d)  \(\frac{4}{3}\)\(\overline{x}\)
• The mean of 1, 7, 5, 3, 4 and 4 is m. The observations 3, 2, 4, 2, 3, 3 and p have the mean (m – 1). Find the median of this set of data.(a) 4 (b) 2.5 (c) 3 (d) 5