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Question 1.

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

of the true population mean? Assume that a previous study has revealed that for such incomes

= $5250.

▸ 10,500

▸ 470

▸ 21

▸ 441

Question 2.

Solve the problem. Round your answer to the nearest whole number unless indicated otherwise.

A laboratory tested 83 chicken eggs and found that the mean amount of cholesterol was 181 milligrams with

milligrams. Use a single value to estimate the mean amount of cholesterol for all chicken eggs.

▸ 181 milligrams

▸ 178 milligrams

▸ 83 milligrams

▸ 183 milligrams

Textbook

Statistical Reasoning for Everyday Life

Edition: 5^th

Authors: Bennett, Briggs, Triola

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