Question: The time it takes for a statistic professor to mark his midterm test is normally distributed with a mean of 5.8mins and a standard deviation

The time it takes for a statistic professor to mark his midterm test is normally distributed with a mean of 5.8mins and a standard deviation of 1.5 mins. There are 60 students in the professors class. Hint: 60 midterm tests of the students in this years class can be considered a random sample of the many thousands of midterm tests the professor has marked and will mark. i) what is the probability that he needs more than 6 hours to mark all the midterm term test? ii) what is the probability that he needs less than 5.5 hours to mark all the midterm term test

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