If the random variable Z has a standard normal distribution, then P(1.17 ≤ Z ≤ 2.26) is:
A)0.1091.
B)0.1203.
C)0.2118.
D)0.3944.

Name: If the random variable Z has a standard normal distribution, then P(1.17 ≤ Z ≤ 2.26) is: A)0.1091. B)0.1203. C)0.2118. D)0.3944.
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Question

Quizplus · Accepted Answer

Using a standard normal distribution table, we find that P(Z ≤ 1.17) = 0.8806 and P(Z ≤ 2.26) = 0.9876. Therefore, P(1.17 ≤ Z ≤ 2.26) = P(Z ≤ 2.26) - P(Z ≤ 1.17) = 0.9876 - 0.8806 = 0.107.

If the Random Variable Z Has a Standard Normal Distribution