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Problem regarding the standard deviation

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Reference no: EM131115876

The number of hours per week American adults spend on home computers is normally distributed with a mean of 4 hours and a standard deviation of 1.5 hour. An American adult is randomly selected.

(A) Find the probability that this adult spends less than 2.5 hours per week on the computer.

(B) Find the probability that this adult spends between 2.2 hours and 6.5 hours on their home computer per week.

(C) If 35 American adults are randomly selected, how many will say they spend less than 3 hours per week on their home computer?

Reference no: EM131115876

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