Find z-scores for a Given Area
-For a standard normal curve, find the z-score that separates the bottom $70 \%$ from the top $30 \%$.
A) $0.53$
B) $0.98$
C) $0.47$
D) $0.12$

Question

Quizplus · Accepted Answer

The z-score that separates the bottom 70% (or 0.70 area under the curve) from the top 30% corresponds to a percentile rank of 70. Looking up this percentile in a standard normal distribution table or using a calculator, we find the z-score closest to this percentile is approximately 0.53.

Find Z-Scores for a Given Area -For a Standard Normal 70%70 \%70%

Find Z-Scores for a Given Area
-For a Standard Normal $70 \%$