What is the difference in probability of getting a z-score of at least 0 and getting a z-score of at least 0.5?
A) 0
B) .1915
C) .5000
D) .8413

Question

Quizplus · Accepted Answer

The probability of getting a z-score of at least 0 is equivalent to the area under the standard normal distribution curve to the right of 0, which is 0.5. The probability of getting a z-score of at least 0.5 is the area under the standard normal distribution curve to the right of 0.5, which is approximately 0.1915. Therefore, the difference in probability is 0.5 - 0.1915 = 0.3085, which is closest to choice B.

What Is the Difference in Probability of Getting a Z-Score