The Academy of Orthopedic Surgeons states that 80% of women wear shoes that are too small for their feet. A researcher wants to be 99% confident that this proportion is within 3% of the true proportion. How large a sample is necessary if the z-score is rounded to two decimal places?
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- The estimated proportion (p̂) = 0.80 (80% of women wear shoes that are too small). - The desired margin of error (E) = 0.03 (3%). - The confidence level = 99%. Show more…
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