On average, Americans drive 13,500 miles per year (The Boston Globe, June 7, 2012). An economist gathers data on the driving habits of 50 residents in the Midwest. The data set, labeled Midwest_Drivers, can be found on the text website.
a. The economist believes that the average number of miles driven annually by Midwesterners is different from the U.S. average. Specify the competing hypotheses to test the economist’s claim.
b. Use Excel to calculate the value of the test statistic and the exact p-value.
c. At the 10% significance level, do the data support the researcher’s claim? Explain.