SOLUTION: What is the total amount of minutes that 99.7% of the fitness club members work out for? On the average, members at a local fitness center work out for 90 minutes with a sta

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Question 1061040: What is the total amount of minutes that 99.7% of the fitness club members work out for?


On the average, members at a local fitness center work out for 90 minutes with a standard deviation of 15 minutes. The distribution is normal.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use EXCEL's NORMSINV to find the z score corresponding to P%28z%29=0.997
z=2.747781
So,
%28X-90%29%2F15=2.747781
X=131.2
Less than or equal to 131 minutes.