If a school's z-score for its sample mean was +3,its percentile rank in the state was
A)99.87%.
B)90.87%.
C)85.87%.
D)95.87%.

Question

Quizplus · Accepted Answer

A z-score of +3 corresponds to a percentile rank of approximately 99.87% based on the standard normal distribution table. This means that the school's sample mean is higher than 99.87% of the other schools in the state, making it a top-performing school.

If a School's Z-Score for Its Sample Mean Was +3,its