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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 90% confident that his estimate is within five
percentage points of the 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. n=
(Round up to the nearest integer.)

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The brand manager for a brand of toothpaste must plan a camp.pdf

  • 1. 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 90% confident that his estimate is within five percentage points of the 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. n= (Round up to the nearest integer.)