Question: 7. A sample is randomly selected from a population with a mean of p. = 50, and a treatment is administered to the individuals in

7. A sample is randomly selected from a population with a mean of p. = 50, and a treatment is administered to the individuals in the sample. After treatment, the sample is found to have a mean of M = 54 with a standard deviation of s = 6.

a. If there are n = 9 individuals in the sample, are the data sufficient to reject H and conclude that the treatment has a significant effect using a two-tailed test with a = .05?

b. If there are n = 25 individuals in the sample, are the data sufficient to conclude that the treatment has a significant effect? Again, assume a two-tailed test with a = .05.

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