A grouped frequency distribution table with classes of equal sizes using 63- 72 (72 included) as one of the class is constructed for the following data.30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88, 40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96, 102, 110, 88, 74, 112, 14, 34, 44What will be the number of classes in the distribution?

# A grouped frequency distribution table with classes of equal sizes using 63- 72 (72 included) as one of the class is constructed for the following data.30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88, 40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96, 102, 110, 88, 74, 112, 14, 34, 44What will be the number of classes in the distribution?

1. A

9

2. B

10

3. C

11

4. D

12

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### Solution:

Given

Frequency of class with equal size is 63-72

To find

No. of class interval = ?

Frequency distribution

13-22

23-32

33-42

43-52

53-62

63-72

73-82

83-92

93-102

103-112

So number of class intervals are : 10

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