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The average starting salary for an MBA graduate in the class of 2018 was ​$112,000. Assume...

The average starting salary for an MBA graduate in the class of 2018 was ​$112,000. Assume the population standard deviation for starting MBA salaries was ​$19,000. A random sample of 30 MBA graduates from the class of 2018 was selected.

a. What is the probability that the sample mean is less than ​$119,000?

b. What is the probability that the sample mean is more than ​$105,000​?

c. What is the probability that the sample mean is between ​$112,000 and ​$119,000​?

d. Suppose the sample mean was ​$115,500. Does this result support the average starting salary​ findings?

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Answer #1

o Pr ( x 2119 000) = 119000 - 11.2000 - 2.0129 3468.90 P & 2119000) apr ( 242.0179) = 0.980 Arc > losooo) =2= 10 sooor/12000

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