The lengths of brook trout caught in a certain Colorado stream are normally distributed with a mean of 14 inches and a standard deviation of 3 inches. What proportion of brook trout caught will be between 12 and 18 inches in length?
A).6563
B).6826
C).2486
D).4082

Question

Quizplus · Accepted Answer

The proportion of brook trout caught between 12 and 18 inches in length is the area under the normal distribution curve between z-scores of -0.67 and 1.33. Using a standard normal distribution table, we find that the area between these z-scores is 0.6563.

The Lengths of Brook Trout Caught in a Certain Colorado