the class marks of distribution are 47,52,57,62,67,72,77,82 determine the class size,class
Class size = Difference between class marks of two consecutive classes.= 52 - 47 = 5
Lower-class limit = class marks - 1/2 of class size= 47+2.5 = 49.5
Upper class limit = class marks + 1/2 of class size = 52+2.5 = 54.5
Since, the class-limits form a continuous frequency distribution; the true class limits and the class-limits are the
same

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can u please rephrase this and make it a question
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By mistake I had posted this question...
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What are you looking for?