MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A New York Times article reported that a survey conducted in 2014 included 36,000 adults, with 3.71% 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 1 percentage are wanted?
a. Assume that nothing is known about the rate of e-cigarette usage among adults.
n=?
b.. Use the results from the 2014 survey.
n=?
c.. Does the use of the result from the 2014 survey have much of an effect on the sample size?
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