Question

In the following frequency distribution, the frequency of the class interval 40 - 50 is miss-
ing. It is known that the mean of the distribution is 52. Find the missing frequency.
Class interval: 1 10-20 20-30 30-40 40-50 50-60 | 60-70 | 70-80
Frequency:
5 T 3 T 4
T 2 T 6 I 13​

Answer 1

Answer:

following frequency distribution, the frequency of the class interval 40 - 50 is miss-

ing. It is known that the mean of the distribution is 52. Find the missing frequency.

Class interval: 1 10-20 20-30 30-40 40-50 50-60 | 60-70 | 70-80

Frequency:

5 T 3 T 4

T 2 T 6 I 13

nii

Answer 2

Answer:

In the following frequency distribution, the frequency of the class interval (40-50) is missing. It is known that the mean of the distribution is 52.find missing frequency of

Wages in Rs. 10-20 20-30

No.of 5 3 workers

30-40 40-50 50-60

4

f

OR

2

60-70

6

70-80

13

The following data gives the information on observed lifetimes (in hours) of 225 electrical 20-40 40-60 60-80 80-100 100-120

components Lifetimes in

hours) Frequency

10 35 52 Determine the modal lifetimes of components.

61

38 29