22. We want to test the following hypothesis: H0: = 3000, H1: < 3000.

Based on a sample size n = 245, from a population with a standard deviation, , of 625. We use the following decision rule:

Reject H0 if X-bar < 2930, otherwise do not reject H0.

What is the power of the test if in fact m is 2960?

0,401

0,774

0,226

0,105

0,842

0,599