A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Transcribed Image Text:A New York Times article reported that a survey conducted in 2014 included 36,000 adults, with 3.68% of them being
regular users of e-cigarettes. Because e-cigarette use is relatively new, there is a need to obtain today's usage rate.
How many adults must be surveyed now if a confidence level of 90% and a margin of error of 3 percentage points
are wanted? Complete parts (a) through (c) below.
a. Assume that nothing is known about the rate of e-cigarette usage among adults.
n = 752
(Round up to the nearest integer.)
b. Use the results from the 2014 survey.
n=
(Round up to the nearest integer.)
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