Heights are normal with mu = 64, sigma = 3 inches. The 90th percentile corresponds to z ≈ 1.28.
What height is at the 90th percentile?
- A
≈ 60.16 in
- B
≈ 64 in
- Ccheck_circle
≈ 67.84 in
- D
≈ 70 in
Explanation
x = mu + z*sigma = 64 + 1.28(3) = 64 + 3.84 = 67.84.