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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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Your Turn

1. A consumer group is testing the gas mileage of three different models of cars. Several cars of each model were driven 500 miles and the mileage was recorded as follows.
670
Test for a difference between sample means using α = 0.05.
2. Perform a pairwise comparison test on the sample means from Problem 1.
3. A vice president would like to determine whether there is a difference between the average number of customers per day between four different stores using the following data.
671
Test for a difference between sample means using ...

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