What z-score value separates the lowest 5% of a normal distribution from the highest 95%?
A) -1.65
B) +1.65
C) -2.57
D) +2.57

Question

Quizplus · Accepted Answer

The z-score that separates the lowest 5% of a normal distribution from the highest 95% is -1.65. This is because z-scores to the left of the mean are negative, and -1.65 corresponds to the point below which 5% of the data falls in a standard normal distribution.

What Z-Score Value Separates the Lowest 5% of a Normal