SOLUTION: A certain diet claims to lower cholesterol by an average of 60 points with a standard deviation of 7. Find the probability that the mean amount lowered will be more than 75 points.

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Question 344056: A certain diet claims to lower cholesterol by an average of 60 points with a standard deviation of 7. Find the probability that the mean amount lowered will be more than 75 points.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the z-score.
z=%28x-mu%29%2Fsigma=%2875-60%29%2F7
z=2.14
P%28z%3C=2.14%29=0.983938
P%28z%3E2.14%29=1-P%28z%3C=2.14%29
P%28z%3E2.14%29=1-0.983938
highlight%28P%28x%3E75%29=P%28z%3E2.14%29=0.01606%29