Find the area under the standard normal curve that lies outside the interval between z = -1.4 and z = -0.5.
A) 0.2278
B) 0.1915
C) 0.7722
D) 0.8085

Question

Quizplus · Accepted Answer

The area under the standard normal curve that lies outside the interval between z = -1.4 and z = -0.5 is the area in the tails of the distribution. This area is equal to 1 - P(-1.4 < Z < -0.5), where P(a < Z < b) is the area under the standard normal curve between z = a and z = b. Using a standard normal table, we find that P(-1.4 < Z < -0.5) = 0.2278. Therefore, the area outside the interval is 1 - 0.2278 = 0.7722.

Find the Area Under the Standard Normal Curve That Lies