Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.
3) a= 0.01 for a right-tailed test.
A) +2.33
B) +1.65
C) +2.33
D) +1.65
4) a = 0.05 for a left-tailed test.
A) -1.96
B) +1.96
C) +1.65
D) -1.65