Solve the Problem $\sigma = \$ 5250$ A)441
B)10,500
C)470
D)21

question 36

Multiple Choice

Solve the problem. Round your answer to the nearest whole number unless indicated otherwise.
-An economist wants to estimate mean annual income for recent college graduates majoring in statistics. how many such incomes must be found if he wants to be 95% confident that the sample mean is within $500 of the true population mean? Assume that a previous study has revealed that for such incomes $\sigma = \$ 5250$

• A)441
• B)10,500
• C)470
• D)21

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