# Question

Full-time Ph.D. students receive an average of $12,837 per year. If the average salaries are normally distributed with a standard deviation of $1500, find these probabilities.

a. The student makes more than $15,000.

b. The student makes between $13,000 and $14,000.

a. The student makes more than $15,000.

b. The student makes between $13,000 and $14,000.

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