Find the critical value for different types of sample size and level of significance:
A paired difference experiment yielded and pairs of observations. In each case described below, what is the rejection region for testing H0: mean= 6 against Ha: mean >6. Use standard deviation = 8.1.
a) nD = 43, a = 0.07 z>
b) nD = 29, a = 0.01
c) nD = 9, a = 0.03 t >