Assume that the red blood cell counts of women are normally distributed with a mean of 4.577 million cells per microliter and a standard deviation of 0.382 million cells per microliter. Find the 80 $80 ^ { \text {th } }$ percentile for the red
Blood cell counts of women.
A) 4.898 million cells per microliter
B) 4.655 million cells per microliter
C) 4.878 million cells per microliter

Question

Quizplus · Accepted Answer

The 80th percentile is the value below which 80% of the data falls. Using a standard normal distribution table, the z-score corresponding to the 80th percentile is 0.84. The 80th percentile for the red blood cell counts of women is then:4.577 + 0.84 * 0.382 = 4.898 million cells per microliter

Assume That the Red Blood Cell Counts of Women Are 80th 80 ^ { \text {th } }80th

Assume That the Red Blood Cell Counts of Women Are $80 ^ { \text {th } }$