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Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human memory

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 and σ = 15. The sample of n = 25 students had a mean score of . Set the alpha level for the study to be .05.

Apr 21 2020 View more View Less

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