If z is a standard normal variable, find the probability.
-P(-0.73

Question

If z is a standard normal variable, find the probability.
-P(-0.73 < z < 2.27)
A) 1.54
B) 0.7557
C) 0.4884
D) 0.2211

Quizplus · Accepted Answer

Using a standard normal table or calculator, we can find that the area to the left of -0.73 is 0.2317 and the area to the left of 2.27 is 0.9884. Therefore, the area between -0.73 and 2.27 is the difference between these two areas, which is 0.9884 - 0.2317 = 0.7567. Rounded to four decimal places, this is 0.7557, which corresponds to answer choice B.

If Z Is a Standard Normal Variable, Find the Probability