the class marks of distribution are

47,52,57,62,67,72,77,82 determine the class size,class limit,ture class limits.

1. Class size = Difference between class marks of two consecutive classes.

=52 - 47 = 5

2. Lower-class limit = class marks - 1/2 of class size

Upper class limit = class marks + 1/2 of class size

Therefore,

for class mark 47 ,class-limits are: 47-2.5 and 47+2.5

= 44.5 and 49.5

=44.5 - 49.5

for class mark 52, class-limits are: 52-2.5 and 52+2.5

=49.5 - 54.5

Similarly, you can calculate the class limits for other class marks.

3. Since, the class-limits form a continuous frequency distribution; the true class limits and the class-limits are the same.

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