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6. You are interested in buying a car that gives good gas mileage. You have narrowed down the choices to 3 types of car model
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Answer #1

(a) The dependent variable is gas mileage and the independent variables are the models of car.

(b) The population is all the car models.

(c) SSW means the sum of squares in the within group.

SSW = 149.04

(d) X = 20.04

SSB = 19.6

SSB means the sum of squares between groups.

(e) MSB = 9.8

MSW = 12.42

(f)

Source SS    df MS F    p-value
Treatment 19.600 2 9.8000 0.79 .4765
Error 149.040 12 12.4200
Total 168.640 14

(g) The p-value is 0.4765.

Since the p-value (0.4765) is greater than the significance level (0.05), we fail to reject the null hypothesis.

Therefore, we cannot conclude that there is a difference between means.

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