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Statistics / Elementary Statistics 12 / Chapter 7.2 / Problem 32BSC

Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

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QUESTION:

Problem 32BSC

Determining Sample Size. In Exercise, use the given data to find the minimum sample size required to estimate a population proportion or percentage.

Fortune Tellers Find the sample size needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.03 margin of error, use a confidence level of 98%, and use results from a prior Pew Research Center poll suggesting that 15% of adults have consulted fortune tellers.

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QUESTION:

Problem 32BSC

Determining Sample Size. In Exercise, use the given data to find the minimum sample size required to estimate a population proportion or percentage.

Fortune Tellers Find the sample size needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.03 margin of error, use a confidence level of 98%, and use results from a prior Pew Research Center poll suggesting that 15% of adults have consulted fortune tellers.

ANSWER:

Answer

Step 1 of 2

Given e=0.03, At 98% confidence level z =2.33,

p=15%

=15/100

=0.15

q=1-p

=1-0.15

=0.85

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