oes the answer to part (a) contradict the statement in the advertisement that the "incidence of drowsiness was similar to placebo?" Explain. Yes. The one-sided test found a statistically significant difference in the experience of drowsiness between the two populations. Yes. The report indicates that a larger percent of the drug users experienced drowsiness than the placebo takers (9% versus 7%). No. The magnitude wasn't much different in a practical sense (9% versus 7%), but the large sample sizes lead to a statistically significant difference. No. The one-sided test did not find a statistically significant difference in the experience of drowsiness between the two populations