The weights of 6-week-old poults (juvenile turkeys) are normally distributed with a mean 9.0 pounds and standard deviation 2.5 pound(s). Find the 75th percentile of the weights.
A) 11.74 lb
B) 10.67 lb
C) 8.54 lb
D) 9.60 lb

Question

Quizplus · Accepted Answer

The 75th percentile corresponds to a z-score of approximately 0.675. Using the formula for a normal distribution, X = μ + zσ, where μ = 9.0 and σ = 2.5, the calculation is 9.0 + 0.675(2.5) = 10.6875, which rounds to 10.67 lb.

The Weights of 6-Week-Old Poults (Juvenile Turkeys) Are Normally Distributed