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Question: Identify the error in constructing frequency distribution table.
ClassFrequency
53 - 578
58 - 624
68 - 713
72 - 771


A ) The number of classes are less than 5
B ) The classes are not continuous
C ) The width of the classes are not equal
D ) All of the above

Steps to derive

1 The number of classes should be between 5 and 20.
 [Rule.]

2 There should be no gaps in a frequency distribution, the classes must be continuous.
 [Rule.]

3 The width of the classes should be equal.
 [Rule.]

4 The number of classes given in the frequency distribution are 4, the classes are not continuous and the width of each class is not same.



Hence the right answer is Option D

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