Given that Z is a standard normal random variable,P(-1.2 ≤ Z ≤ 1.5)is:
A)0.8181
B)0.4772
C)0.3849
D)0.5228

Question

Quizplus · Accepted Answer

To find $P(-1.2 \leq Z \leq 1.5)$, we look up the Z-scores in the standard normal distribution table or use a calculator. The value for $Z = 1.5$ is approximately 0.9332, and for $Z = -1.2$, it is approximately 0.1151. Subtracting these, $0.9332 - 0.1151 = 0.8181$, gives the probability of Z falling between -1.2 and 1.5.

Given That Z Is a Standard Normal Random Variable,P(-1