ter 2018> Assessment Due in 6 hours, 8 minutes. Due Mon 03/05/2018 12:59 am A 20

Question

ter 2018> Assessment Due in 6 hours, 8 minutes. Due Mon 03/05/2018 12:59 am A 2011 Gallup survey based on telephone and face-to-face interviews with 4,220 adults in China, aged 15 and older suggests that 30% smoke regularly or occasionally. The following is also noted "one can say with 95% confidence that the maximum margin of sampling error is 1.9 percentage points". Which of the following is true based on the results of this survey? If the sample size was larger, the margin of error would be larger as well. If we were to randomly sample another group of 4,220 Chinese adults we would find that exactly 30% of them smoke as well. O Exactly 30% of all Chinese adults smoke. Owe are 95% confident that 28.1 % to 31.9 % of all Chinese adults smoke. Owe are 95% confident that 26.2% to 33.8% of all Chinese adults smoke. Submit

Explanation / Answer

Option D is Correct.

95% Interval

(30-1.9, 30+1.9)

= (28.1%, 31.9%)

So, we are 95% confident that 28.1% to 31.9% of all chinese adults smoke

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