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  3. 3. a political candidate wants to estimate the mea

3. A political candidate wants to estimate the mean income in her district. If the standard...

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Statistics

3. A political candidate wants to estimate the mean income inher district. If the standard deviation for incomes is known to be$10,000, how large a sample must she take if she wishes to be 99%certain that her estimate is within $2000 of the true mean?

4. A company that manufactures golf clubs wants to estimate theproportion of golfers who are left-handed. How large a sample mustthey take if they want to be 90% certain that their estimate iswithin 6% of the true proportion?

Answer & Explanation Solved by verified expert
4.0 Ratings (462 Votes)
3Solution Given thatstandard deviation s 10000Margin of error E 2000At 99    See Answer
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