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Table gives the miles per gallon for each of 4 different octanes of gasoline and 3 types of car (heavy, medium, and light) in a completely randomized design. Should the hypothesis be accepted at the 1% level of significance that the population means are the same for each (a) Octane of gasoline? (b) Type of car?
Table Miles per Gallon for Each of 4 Octanes and 3 Types of Car
Type of Car
Octane 1
Octane 2
Octane 3
Octane 4
Heavy
8
9
10
Medium
16
15
18
17
Light
24
26
28
30
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