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Gap, Banana Republic, J. Crew, Yahoo, and America Online are just a few of the many companies interested in knowing the percentage of adults who
Gap, Banana Republic, J. Crew, Yahoo, and America Online are just a few of the many companies interested in knowing the percentage of adults who buy clothing online. How many adults must be surveyed in ordered to be 95% confident that the sample percentage is in error by no more than three percentage points?
a. Use this recent result from the Census Bureau: 66% of adults buy clothing online.
b. Assume that we have no prior information suggesting a possible value of the proportion
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