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RD Chapter 32- Statistics Ex-32.6 Interview Questions Answers

Question 1 :

Calculate the meanand S.D. for the following data:

Expenditure (in ₹):

0-10

10-20

20-30

30-40

40-50

Frequency:

14

13

27

21

15

Answer 1 :

Question 2 :

Calculate thestandard deviation for the following data:

Class:

0-30

30-60

60-90

90-120

120-150

150-180

180-210

Frequency:

9

17

43

82

81

44

24

Answer 2 :


Question 3 :

Calculate the A.M.and S.D. for the following distribution:

Class:

0-10

10-20

20-30

30-40

40-50

50-60

60-70

70-80

Frequency:

18

16

15

12

10

5

2

1

Answer 3 :


Question 4 :

A student obtainedthe mean and standard deviation of 100 observations as 40 and 5.1 respectively.It was later found that one observation was wrongly copied as 50, the correctfigure is 40. Find the correct mean and S.D.

Answer 4 :


Question 5 :

Calculate the mean,median and standard deviation of the following distribution

Class-interval

31-35

36-40

41-45

46-50

51-55

56-60

61-65

66-70

Frequency:

2

3

8

12

16

5

2

3

Answer 5 :



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RD Chapter 32- Statistics Ex-32.6 Contributors

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