The class marks of a frequency distribution are 6,10,14,18,22,26,30. Find the class size and the class intervals.
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class size=4
CI: 4-8
8-12
12-16
16-20
20-24
24-28
28-32
CI: 4-8
8-12
12-16
16-20
20-24
24-28
28-32
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