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the brand manager for a brand of toothpaste must plan a campaign designed to increase brand...

the brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 95% confident that his estimate is within eight percentage points of the true population percentage?

Assume that a recent survey suggests that about 77​% of adults have heard of the brand.

n= ?

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