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
|
9
|
10
|
|
Medium
|
16
|
15
|
18
|
17
|
|
Light
|
24
|
26
|
28
|
30
|