Question

The class marks of a distribution are 47, 52, 57, 62, 67, 72. Determine the i) class size ii) class limits.

Answer 1

class size = difference between two consecutive class marks

therefore clas size=5

lower limit =class mark -class size/2
=44.5
upper limit =class mark +class size /2
=49.5

therefore the class limits are
44.5-49.5
49.5-54.5
54.5-59.5
59.5-64.5
64.5-69.5
69.5-74.5.


hope it helps.....