Posted by **melissa** on Saturday, April 14, 2012 at 1:45pm.

20. Explain how the power of a hypothesis test is

influenced by each of the following. Assume that all

other factors are held constant.

a. Increasing the alpha level from .01 to .05.

b. Changing from a one-tailed test to a two-tailed test.

- statistics -
**MathGuru**, Saturday, April 14, 2012 at 5:44pm
Increasing alpha from .01 to .05 increases the power of the test. The higher the level, the more powerful the test.

If the test is one-tailed, the test will be more powerful because one is less likely to miss a statistically significant test if the predicted direction is accurate.

I hope this helps.

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