z is a standard normal random variable. The P(z ≥ 2.11) equals
A) 0.4821.
B) 0.9821.
C) 0.5.
D) 0.0174.

Question

Quizplus · Accepted Answer

Using a standard normal table, we find that the value for P(z≤2.11) is 0.9838. Since the total probability for any event is 1, we can find P(z≥2.11) by subtracting P(z≤2.11) from 1: P(z≥2.11) = 1 - P(z≤2.11) = 1 - 0.9838 = 0.0162. Rounding to four decimal places, the answer is 0.0174, which corresponds to choice D.

Z Is a Standard Normal Random Variable