SOLUTION: The time for a professor to grade an exam is normally distributed with a mean of 12.6 minutes and a standard deviation of 2.5 minutes. The interval around the mean that contains 95

Question 883164: The time for a professor to grade an exam is normally distributed with a mean of 12.6 minutes and a standard deviation of 2.5 minutes. The interval around the mean that contains 95% of the times needed to grade exams is
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The time for a professor to grade an exam is normally distributed with a mean of 12.6 minutes and a standard deviation of 2.5 minutes. The interval around the mean that contains 95% of the times needed to grade exams is
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Lower limit:: 12.6-1.96*2.5 = 7.7 min
Upper limit:: 12.6+1.96*2.5 = 17.5 min
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Cheers,
Stan H.
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