Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals).

Question

c. P(z -1.5)


d. P(z -2.5)

Answer 1

c. P(z < -1.5) = 0.0062

d. P(z< -2.5) = 0.0668

Answer 2

This is what I got too but the web where I do my homework says it is wrong.

Answer 3

C. P(Z>-1.5) =0.9938
d. P (Z>-2.5) =0.9332