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Some people believe that fish oil can improve memory. In a study, a researcher obtains a...

Some people believe that fish oil can improve memory. In a study, a researcher obtains a sample of n = 27 individuals and has each person take fish oil every night for 70 nights. At the end of the 70 nights, each person takes a test. For the general population, scores from the test form a normal distribution with a mean of μ = 52 and a standard deviation of σ = 14. The sample of research individuals had an average of M = 59. Find the Test Statistics.

Math   Statistics-And-Probability   
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Answer #1

Given that some people believe that fish oil can improve memory. In a study, a researcher obtains a sample of n = 27 individuals and has each person take fish oil every night for 70 nights.

Given the general population, scores from the test form a normal distribution with a mean of μ = 52 and a standard deviation of σ = 14. The sample of research individuals had an average of M = 59.

Thus the test statistic is calculated as:

Hence the test statistic is calculated as 2.598

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