Question

The class marks of a distribution are 26, 31, 36, 41, 46, 51, 56, 61, 66, 71. Find the true class
limits.​

Answer 1

Here,

Class size = Difference b/w any two consecutive class marks = 31-26 = 5

Therefore,

Lower limit of first class interval = 

Upper limit of first class interval = 

Therefore, first class interval is 23.5-28.5.

Thus, the class intervals are :

Since, the classes are formed by exclusive method. Therefore, these limits are true class limits. 

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Answer 2

Answer:

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