Choose the value z of a standard normal variable Z that 30% of the observations fall above z.
A. 0.525
B. About 2 standard deviations above the mean
C. 0.70
D. 0.30
Answer:A
Choose the value z of a standard normal variable Z that 30% of the observations fall above z.
A. 0.525 B. About 2 standard deviations above the mean C. 0.70 D. 0.30