null hypothesis

(1) List the five steps of hypothesis testing, and explain the procedure and logic of each.

(2) Based on the information given for each of the following studies; decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, (b) the Z score on the comparison distribution for the sample score, and (c) your conclusion. Assume that all populations are normally distributed. Population Study µ s Sample Score p Tails of Test A 5 1 7 .05 1 (high predicted) B 5 1 7 .05 2 C 5 1 7 .01 1 (high predicted) D 5 1 7 .01 2

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