Thirty (40) automobiles were tested for fuel efficiency (in miles per gallon).This frequency distribution was obtained:
Class Interval
8-12
13-17
18-22
23-27
28-32
Frequency
5
7
17
7
4
n=40
Class Interval
8-12
13-17
18-22
23-27
28-32
Frequency
5
7
17
7
4
n=40
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