Mathematics, 14.02.2020 06:19, genny42

Some researchers claim that herbal supplements (such as ginkgo biloba) can impact 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 with σ = 15. The sample of n = 25 students had a mean score of M = 76.a. Are the data sufficient to demonstrate that the herb has a significant effect on memory? Use a two-tailed test with
α
= 0.05.

b. Compute Cohen's d for this study.

Answers: 3

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