based on the information given for the following studiesdecide whether to reject the null hypothesis. For each, give (a)the Z-score cut-off(or cut-offs) on the comparison distribution at which the null hypothesis should be rejected, (b)the Z score on the comparison distribution for the sample score, and (c)your conclusion. Assume that all the populationsare normally distributed.

study

A-D population mean=5(for all)

standard deviation=1(for all)

sample score=7(for all)

p=for study A & B= .05

p= for study C&D = .01

tails of test study a=1(high predicted)

study b=2

study c=1 (high predicted)

study d=2