Question: Problem 14: 14. The herbal supplement ginkgo biloba is advertised as producing an increase in physical strength and stamina. To test this claim, a sample of n=36 adults is obtained and each person is instructed to take the regular dose of the herb for a period of 30days. At the end of the 30-day period, each person is tested on a standard treadmill task for which the average, age-adjusted score is =55. The individuals in the sample produce a men score of M=58.5 with SS=5040.

(a) Are these data sufficient to conclude that the herb has a statistically significant effect using a two-tailed test with alpha=.05? b. What decision would be made if the researcher used a one-tailed test with alpha=.05?

(b) What decision would be made if the researcher used a one-tailed test with alpha=.05? (Assume that the herb is expected to increase scores).