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RD Chapter 24- Measures of Central Tendency Ex-24.2 Interview Questions Answers

Question 1 :
Calculate the mean for the following distribution
x 5 6 7 8 9
f 4 8 14 11 3

Answer 1 :


Question 2 :
Find the mean of the following data:
x 19 21 23 25 27 29 31
f 13 15 16 18 16 15 13

Answer 2 :

Question 3 :
Find the mean of the following distribution:
x 10 12 20 25 35
f 3 10 15 7 5

Answer 3 :

Question 4 : Five coins were simultaneously tossed 1000 times and at each toss the number of heads were observed. The number of tosses during which 0, 1, 2, 3, 4 and 5 heads were obtained are shown in the table below. Find the mean number of heads per toss.

Answer 4 :

Question 5 :
The mean of the following data is 20.6. Find the value of p.
x 10 15 p 25 35
f 3 10 25 7 5

Answer 5 : Mean = 20.6

Question 6 :
If the mean of the following data is 15, find p?.
x 5 10 15 20 25
f 6 p 6 10 5

Answer 6 : Mean = 15

Question 7 :
Find the value of p for the following distribution whose mean is 16.6.
x 8 12 15 p 20 25 30
f 12 16 20 24 16 8 4

Answer 7 : Mean = 16.6

Question 8 :
Find the missing value of p for the following distribution whose mean is 12.58.
x 5 8 10 12 p 20 25
f 2 5 8 22 7 4 2

Answer 8 : Mean = 12.58

Question 9 :
Find the missing frequency (p) for the following distribution whose mean is 7.68.
x 3 5 7 9 11 13
f 6 8 15 p 8 4

Answer 9 : Mean = 7.68