In a normal distribution of 200 cases, what z score divides the top 20 cases from the bottom 180?
A) +1.28
B) +.25
C) +.84
D) +1.96

Name: In a normal distribution of 200 cases, what z score divides the top 20 cases from the bottom 180? A) +1.28 B) +.25 C) +.84 D) +1.96
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Quizplus · Accepted Answer

A z score of +1.28 corresponds to the 90th percentile, which divides the top 10% (20 cases) from the bottom 90% (180 cases) in a normal distribution.

In a Normal Distribution of 200 Cases, What Z Score