Z is a standard normal random variable. The P (-1.20 $\le$ z $\le$ 1.50) equals
A)0.0483
B)0.3849
C)0.4332
D)0.8181

Question

Quizplus · Accepted Answer

The probability P(-1.20 ≤ z ≤ 1.50) is found by calculating the area under the standard normal curve between z = -1.20 and z = 1.50. Using standard normal distribution tables or a calculator, P(z ≤ 1.50) is approximately 0.9332 and P(z ≤ -1.20) is approximately 0.1151. Therefore, P(-1.20 ≤ z ≤ 1.50) = 0.9332 - 0.1151 = 0.8181.

Z Is a Standard Normal Random Variable ≤\le≤ Z ≤\le≤ 150) Equals A)0

Z Is a Standard Normal Random Variable $\le$ Z $\le$ 150) Equals
A)0