statistics
posted by melissa .
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 onetailed test to a twotailed test.

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 onetailed, 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.