Boundaries for critical region if alpha level is changed

Reference no: EM1321540

Q1) Value of z score in hypothesis test is influenced by variety of factors. Suppose that all other variables are held constant, describe how value of z is influenced by each of the following:

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

b) Increasing population standard deviation.

c) Increasing number of scores in sample.

Q2) If alpha level is changed from a = 0.05 to a = 0.01

a) What occurs to boundaries for critical region?

b) What occurs to probability of type I error?

Reference no: EM1321540

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