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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
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 condence level of 95% and a margin of error of 1.5 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 = (Round up to the nearest integer.) b. Use the results from the 2014 survey. n = (Round up to the nearest integer.) c. Does the use of the result from the 2014 survey have much of an effect on the sample size? 0 A. No, using the result from the 2014 survey does not change the sample size. 0 B. Yes, using the result from the 2014 survey only slightly increases the sample size. 0 C. No, using the result from the 2014 survey only slightly reduces the sample size. 0 D. Yes, using the result from the 2014 survey dramatically reduces the sample size
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