If a hypothesis test using a sample of n = 16 scores produces a t statistic of t = 2.15,then the correct decision is to reject the null hypothesis for a two-tailed test with a = .05.

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To determine whether to reject the null hypothesis for a two-tailed test with alpha = .05, we need to compare the absolute value of the t statistic (|2.15| = 2.15) to the critical value of t with df = 15 (n - 1) and alpha = .025 (for a two-tailed test). Looking up the critical value in a t distribution table or using a calculator, we find that t_crit = 2.131. Since the t statistic (2.15) is greater than the critical value (2.131), we reject the null hypothesis. Therefore, the statement is true and the answer is A.

If a Hypothesis Test Using a Sample of N =