Question

Given the following observations group the data into 4 groups. Answers should show intervals and frequency for each interval.

63, 72, 74, 62, 53, 78, 58, 65, 52, 70, 79, 62, 86, 79, 65, 75, 53,37,65, 72

Answer 1

Given data in ascending order as follow,

37 52 53 53 58 62 62 63 65 65 65 70 72 72 74 75 78 79 79 86

n= 20

min =37

max = 86

We want 4 equal width group so we can make table of given ungrouped data to grouped as

Interval	Frequency
37-49	1
50-62	6
63-75	9
75-87	4
	Total =20

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Thank You !