Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human memory. To test this claim, a researcher selects a sample of n = 25 college students. Each student is given a ginkgo biloba supplement daily for six weeks and then all the participants are given a standardized memory test. For the population, scores on the test are normally distributed with μ = 70. The sample of n 25 students had a mean score of top enclose X 75 with a standard deviation S = 16. Test the hypothesis that = the ginkgo biloba supplements enhance human memory with an alpha alpha space equals.05. What is/are the Critical Value(s )? +1.71 and -1.71 +1.71 1.71 + 1.65 and -1.65 + 1.65 -1.65 I

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