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The amount of time the university professors devote to their jobs per week is normally
distributed with a mean of 60 hours and a standard deviation of 20 hours. i) What is the
probability that a professor works for more than 70 hours per week? ii) Find the probability that
the mean amount of work per week for four randomly selected professors is more than 50 hours?

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  • 1. The amount of time the university professors devote to their jobs per week is normally distributed with a mean of 60 hours and a standard deviation of 20 hours. i) What is the probability that a professor works for more than 70 hours per week? ii) Find the probability that the mean amount of work per week for four randomly selected professors is more than 50 hours?