The U. S. Fish and Wildlife Service reported that the mean length of six-year-old rainbow trout in the Arolik River in Alaska is 481 millimeters with a standard deviation of 41 millimeters. Assume these lengths are normally distributed. A size limit is to be put on trout that are caught. What should the size limit be so that 15% of six-year-old trout have lengths shorter than the limit

The size limit for 15% of of six-year-old trout is 438.52 mm.                

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 481 millimeters

Standard Deviation, σ = 41 millimeters

We are given that the distribution of mean length of six-year-old rainbow trout is a bell shaped distribution that is a normal distribution.

Formula:

We have to find the value of x such that the probability is 0.15

Calculation the value from standard normal z table, we have,  

Thus, the size limit for 15% of of six-year-old trout is 438.52 mm.

step-by-step explanation:

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