SOLUTION: The length of a certain kind of Colorado brook trout is normally distributed with a mean of 12.5 inches and a standard deviation of 1.2 inch. What minimum size limit should the Dep

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Question 781591: The length of a certain kind of Colorado brook trout is normally distributed with a mean of 12.5 inches and a standard deviation of 1.2 inch. What minimum size limit should the Department of Natural Resources set if it wishes to allow people to keep 80 percent of the trout they catch?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
For an area 0.2 in the right portion of the normal curve z=0.841
z=(x-m)/s
0.841=(x-12.5)/1.2
x-12.5=1.2*0.841
x-12.5=1.01
x=13.51
.
Ed