What proportion of the class has a midterm grade of less

Reference no: EM13240626

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

a. What proportion of the class has a midterm grade of less than 75?

b. What is the probability that a sample of 50 students has an average midterm grade that is less than 75?

Reference no: EM13240626

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