(Answered) A research concludes that the number of hours of exercise

Statistics

A research concludes that the number of hours of exercise per week for adults is normally distributed with a mean of 3.5 hours and a standard deviation of 3 hours.

(a) Find the 75th percentile for the distribution of exercise time per week.

(b) What is the probability that a randomly selected adult has more than 5 hours of exercise per week?

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