Solve the problem.
-The weights of the fish in a certain lake are normally distributed with a mean of 20 lb and a standard deviation of 9. If 9 fish are randomly selected, what is the probability that the mean weight will be between 17.6 and 23.6
Lb?
A) 0.3270
B) 0.6730
C) 0.4032
D) 0.0968

Question

Quizplus · Accepted Answer

The sampling distribution of the sample mean will have a mean of 20 lb and a standard deviation of 9/sqrt(9) = 3 lb. Using the standard normal distribution, the probability that the sample mean is between 17.6 and 23.6 is approximately 0.6730.

Solve the Problem. -The Weights of the Fish in a Certain Lake Are