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Assume we are interested in looking at GRE scores of students admitted to graduate schools. Suppose...

Assume we are interested in looking at GRE scores of students admitted to graduate schools. Suppose GRE scores are Normally distributed with an average of 317 and a standard deviation of 11.5 points. Suppose we take a sample of 15 admitted students.

What is the probability that the average GRE score from our sample of 15 students will be above 320?

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