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 80% confident that his estimate is within six percentage points of true population percentage? Complete parts (a) through (c) below. A.) assume that nothing is known about the percentage of adults who have heard of the brand. B.) assume that a recent surgery suggest that about 76% of adults have heard of the brand.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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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 80% confident that his estimate is within six percentage points of true population percentage? Complete parts (a) through (c) below. A.) assume that nothing is known about the percentage of adults who have heard of the brand. B.) assume that a recent surgery suggest that about 76% of adults have heard of the brand.
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