Using the same example/data repeated here: As an analyst for Consumer Reports you want to find out whether the average miles per gallon (MPG) of a new SUV hybrid is consistent with the MPG advertised by the auto maker( = 31 MPG highway). You test drive15of these new SUVs under simulated highway driving conditions on a track and record the average MPG obtained for the 15 test vehicles. You plan to conduct atwo-tailed t-test (a = .05)to determine if there is a significant departure (in either direction) from the advertised average of 31 MPG. After completing the test drivesthe mean MPG for your sample of 15 test vehicles was 28.7 MPG, with a standard deviation of 3.20 MPG.

28.Given your t-value and df,you would

answers include:

reject the null hypothesis

confirm that the alternative hypothesis is true

fail to reject the null hypothesis

confirm that the null hypothesis is false