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28. The average salary for graduates entering the actuarial field is $40,000. If the salaries are...

28. The average salary for graduates entering the actuarial field is $40,000. If the salaries are normally distributed with a variance of $25,000, find the probability that a group of nine graduates will have a group average over $45,000.

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Part A: Complete Z curve sketch: 3 pts

Part B: Calculate Z formula: 3 pts

Part C: Determine probability: 3 pts

Math   Statistics-And-Probability   
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