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show your work in calculating Z and testing the hypothesis Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance...
11. show your work in calculating Z and testing the hypothesis
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 = 36 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 = 36 students had a mean score of M = 75.
a. What is the value of Z you calculate?
(2 point)
b. What is the value of Z from the table for a two tailed test at .05?
(2 point)
c. Are the data sufficient to that the herb has a significant effect on memory using a two-tailed test with α = .05. say why yes or no.
(2 point)
d. Compute Cohen’s d for this study.
(2 point)
Please show work and explain, completely lost on this
