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?