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Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of...

Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is 187000 dollars. Assume the standard deviation is 38000 dollars. Suppose you take a simple random sample of 81 graduates.

Find the probability that a single randomly selected policy has a mean value between 180244.4 and 190800 dollars.
P(180244.4 < X < 190800) =

Find the probability that a random sample of size n=81n=81 has a mean value between 180244.4 and 190800 dollars.
P(180244.4 < M < 190800) =

Math   Statistics-And-Probability   
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