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 80th percentile for the red blood cell counts of women.

Question

Quizplus · Accepted Answer

The 80th percentile corresponds to a z-score of approximately 0.84. Using the formula X = μ + zσ, where μ is the mean and σ is the standard deviation, we calculate X = 4.577 + 0.84(0.382) = 4.898 million cells per microliter.

Assume That the Red Blood Cell Counts of Women Are