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8. A nutrition store in the mall is selling Memory Booster, which is a concoction of herbs and minerals that is intended to improve memory

8. A nutrition store in the mall is selling "Memory Booster," which is a concoction of herbs and minerals that is intended to improve memory performance, but there is no good reason to think it couldn't possibly do the opposite. To test the effectiveness of the herbal mix, a researcher obtains a sample of 8 participants and asks each person to take the suggested dosage each day for 4 weeks. At the end of the 4-week period, each individual takes a standardized memory test. In the general population, the standardized test is known to have a mean of = 7. (Set the significance level = .05) *please give your own sample mean and standard deviation*

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