On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what is the percentile rank of a score of 56?
A) 58.30
B) 0.00
C) 25.27
D) 38.30
E) 11.70

Question

Quizplus · Accepted Answer

To find the percentile rank, calculate the z-score: z = (X - μ) / σ = (56 - 75) / 16 = -1.1875. Using a standard normal distribution table, a z-score of -1.1875 corresponds to a percentile rank of approximately 11.70.

On a Test with a Population Mean of 75 and Standard