A New York Times article reported that a survey conducted in 2014 included 36,000adults, 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 95%and a margin of error of 3percentagepoints are wanted? Complete parts (a) through (c) below. Question content area bottom Part 1 a. Assume that nothing is known about the rate of e-cigarette usage among adults. n=enter your response here (Round up to the nearest integer.) Part 2 b. Use the results from the 2014 survey. n=enter your response here (Round up to the nearest integer.) Part 3 c. Does the use of the result from the 2014 survey have much of an effect on the sample size? A. Yes, using the result from the 2014 survey only slightly increases the sample size. B. Yes, using the result from the 2014 survey dramatically reduces the sample size. C. No, using the result from the 2014 survey does not change the sample size. D. No, using the result from the 2014 survey only slightly reduces the sample size.
A New York Times article reported that a survey conducted in 2014 included 36,000adults, 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 95%and a margin of error of 3percentagepoints are wanted? Complete parts (a) through (c) below. Question content area bottom Part 1 a. Assume that nothing is known about the rate of e-cigarette usage among adults. n=enter your response here (Round up to the nearest integer.) Part 2 b. Use the results from the 2014 survey. n=enter your response here (Round up to the nearest integer.) Part 3 c. Does the use of the result from the 2014 survey have much of an effect on the sample size? A. Yes, using the result from the 2014 survey only slightly increases the sample size. B. Yes, using the result from the 2014 survey dramatically reduces the sample size. C. No, using the result from the 2014 survey does not change the sample size. D. No, using the result from the 2014 survey only slightly reduces the sample size.
A New York Times article reported that a survey conducted in 2014 included 36,000adults, 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 95%and a margin of error of 3percentagepoints are wanted? Complete parts (a) through (c) below. Question content area bottom Part 1 a. Assume that nothing is known about the rate of e-cigarette usage among adults. n=enter your response here (Round up to the nearest integer.) Part 2 b. Use the results from the 2014 survey. n=enter your response here (Round up to the nearest integer.) Part 3 c. Does the use of the result from the 2014 survey have much of an effect on the sample size? A. Yes, using the result from the 2014 survey only slightly increases the sample size. B. Yes, using the result from the 2014 survey dramatically reduces the sample size. C. No, using the result from the 2014 survey does not change the sample size. D. No, using the result from the 2014 survey only slightly reduces the sample size.
A New York Times article reported that a survey conducted in 2014 included 36,000adults, 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 95%and a margin of error of
a. Assume that nothing is known about the rate of e-cigarette usage among adults.
n=enter your response here
(Round up to the nearest integer.)
Part 2
b. Use the results from the 2014 survey.
n=enter your response here
(Round up to the nearest integer.)
Part 3
c. Does the use of the result from the 2014 survey have much of an effect on the sample size?
A.
Yes, using the result from the 2014 survey only slightly increases the sample size.
B.
Yes, using the result from the 2014 survey dramatically reduces the sample size.
C.
No, using the result from the 2014 survey does not change the sample size.
D.
No, using the result from the 2014 survey only slightly reduces the sample size.
Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.
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