4. A sample is randomly selected from a population with a mean of µ = 50 and a treatment is administered to the individuals in the sample. After treatment, the sample is found to have a mean of M = 56 with a standard deviation of s = 8. If there are n = 4 individuals in the sample, are the data sufficient to reject H, and conclude that the treatment has a significant effect using a two-tailed one sample t-test with a = .05? Hint: For problem #4 (and # 5) Use the t-distribution table (Table B.2) to find your critical values. 5. Refer back to problem #4. If there are n = 16 individuals in the sample, are the data sufficient to conclude that the treatment has a significant effect? Again, assume a two-tailed one sample t-test with a = .05.

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