An experiment was carried out to see how alcohol affected people. The number of errors made in a test of visual and motor abilities by a treatment group of people who drank ethanol and a control group of people who were given a placebo. To test the hypothesis that the two groups are from populations with the same mean, use a 0.05 significance level. Do these findings back up the popular perception that drinking is dangerous for drivers, pilots, ship captains, and other professionals? Use the table below.