# Question

Let’s modify Exercise 15.12 to have sample means of 25 and 28, with a pooled standard deviation of 8 and sample sizes of 20 and 20.

(a) What is the a priori power of this experiment?

(b) Run the t test on the data.

(c) What, if anything, does the answer to (a) have to say about the answer to (b)?

(a) What is the a priori power of this experiment?

(b) Run the t test on the data.

(c) What, if anything, does the answer to (a) have to say about the answer to (b)?

## Answer to relevant Questions

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