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The value of z-score in a hypothesis test is influenced by a variety of factors. Assuming that all other variables are held constant, explain how the value of z is influenced by each of the following

a. Increasing the difference between the sample mean and the original population mean.

b. Increasing the population standard deviation"

c. Increasing the number of scores in the sample

4. Explain how the power of 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 one-tailed test to a two-tailed test.

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