2. One-Way Airfares The average one-way airfare from Pittsburgh to Washington, D.C., is $236. A random sample of 20 one-way during a particular month had a mean of $210 with a standard deviation of $43. At a = 0.02, is there sufficient evidence to conclude a difference from the stated mean? Use the sample statistics to construct a 98% confidence interval for the true mean one-way airfare from Pittsburgh to Washington, D.C., and compare your interval to the results of the test. Do they support or contradict one another? Source: www.fedstats.gov