A sample of difference scores from a repeated-measures experiment has a mean of MD=3 with a standard deviation of s=4 . a. If n=4 , is this sample sufficient to reject the null hypothesis using a two-tailed test with αα=.05 ? b. Would you reject H0 if n=16 ? Again, assume a two-tailed test with αα=.05 . c. Explain how the size of the sample influences the likelihood of finding a significant mean difference.

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