Step 1: Determine the number of classes.

Suppose the above values represent a sample of 20 supermarkets and the price (in �) of beef sold in those markets. With a sample size as small as n=20, it�s recommended to construct no more than 5 classes.

85.1 99.5 113.7 113.7

87.8 104.2 113 113

88.9 106.5 116 116

94.5 109.7 108.7 108.7

99.9 110.8 115.4 115.4

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