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? Complete parts (a) through (c) below.
a) Assume that nothing is known about the percentage of adults who have heard of the brand.
n=151
(Round up to the nearest integer.)
b) Assume that a recent survey suggests that about 76% of adults have heard of the brand.
n=
(Round up to the nearest integer.)

Question

06-11-2022
Mathematics

Answered

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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 95% confident that his estimate is within eight 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=151
(Round up to the nearest integer.)
b) Assume that a recent survey suggests that about 76% of adults have heard of the brand.
n=
(Round up to the nearest integer.)

Sagot :

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