(Answered) Suppose the mean test scores for a college enter exam is

Statistics

Suppose the mean test scores for a college enter exam is normally distributed with mean = 78 and standard deviation = 12.

a). If an individual student is selected at random, what is the probability that this student's score is over 80?

b). A classroom of 16 of these students is used as a sample. What is the probability that the class mean is greater than 80?

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