Marks on statistics midterm test are normally distributed, Ask an Expert

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Q1) Time it takes for statistics professor to mark his midterm test is normally distributed with mean of 4.8 minutes and standard deviation o f1.3 minutes.

There are sixty students in professor's class. Determine the probability that he requires more than 5 hours to mark all midterm tests?( Midterm tests of 60 students in this year's class can be considered random sample of many thousands of midterm tests professor has marked and will mark)

Marks on statistics midterm test are normally distributed with mean of 78 and a standard deviation of 6.

a) What proportion of class has midterm mark of less than 75?

b) Determine the probability that class of 50 has average midterm mark that is less than 75?

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Category:- Statistics and Probability
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