Business Weekly conducted a survey of graduates from several top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is $185,000. Assume the standard deviation is $40,000. Suppose you take a simple random sample of 22 graduates. Round all answers to four decimal places if necessary. What is the standard deviation of distribution of X? 185,000 What is the standard deviation of X? 40,000 • For a single randomly selected graduate, find the probability that her salary is between $175,608 and $186,672. 0.1070 • For a simple random sample of 22 graduates, find the probability that the average salary is between $175,608 and $186,672. 0.0912 • For part d), is the assumption of normal necessary? O NoO Yes

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Business Weekly conducted a survey of graduates from
several top MBA programs. On the basis of the survey,
assume the mean annual salary for graduates 10 years after
graduation is $185,000. Assume the standard deviation is
$40,000. Suppose you take a simple random sample of 22
graduates. Round all answers to four decimal places if
necessary.
What is the standard deviation of distribution of X?
185,000
• What is the standard deviation of X?
40,000
• For a single randomly selected graduate, find the
probability that her salary is between $175,608 and
$186,672. 0.1070
• For a simple random sample of 22 graduates, find the
probability that the average salary is between $175,608
and $186,672. 0.0912
For part d), is the assumption of normal necessary? O
NoO Yes
Transcribed Image Text:Business Weekly conducted a survey of graduates from several top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is $185,000. Assume the standard deviation is $40,000. Suppose you take a simple random sample of 22 graduates. Round all answers to four decimal places if necessary. What is the standard deviation of distribution of X? 185,000 • What is the standard deviation of X? 40,000 • For a single randomly selected graduate, find the probability that her salary is between $175,608 and $186,672. 0.1070 • For a simple random sample of 22 graduates, find the probability that the average salary is between $175,608 and $186,672. 0.0912 For part d), is the assumption of normal necessary? O NoO Yes
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