This problem has 6 parts. This is part 1 of 6.
A car magazine makes the claim, "On average, there is no difference in gas mileage between automatic and manual transmission cars."
The gas mileage in miles per gallon (mpg) for 30 different cars was recorded for both types of transmissions. A summary of the data is given below.
Using this summary data, test the car magazine's claim using a significance level of 0.05.
Select the pair of hypotheses that are appropriate for testing this claim.