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In a study of national smoking trends, two random samples at U.S. adults were selected. one in 1995 and one in 2010. The table below
In a study of national smoking trends, two random samples at U.S. adults were selected. one in 1995 and one in 2010. The table below shows the results: Year 1 ?9 5 2010 Smokers 2042 1715 Non-Smokers 2234 21% Total 4276 3908 Let P] be the proportion ol all U5. adults that smoked in 1995. Let P2 be the proportion ol all U.S. adults that smoked in 2010. Blank #1: What is 151? Round to two decimal places. Blank #2: What is 152? Round to two decimal places. Bla nk #3: Suppose we wish to construct a condence interval examining the difference between the proportion of people who smoke. What is the standard error estimate? Use your rounded answers from blank\" and #2 in your calculation and round your answer to ldecimal places. Blanks #4 and #5: Use vouranswer to blank #3 or use yourcalculator to find a ?5% conlidence interval tarp] 112. Report this by correctly lilting in the statement below to interpret the interval, We are 95% confident that the true dilference in proportions cl smokers in 1995 and 2010 is between Blank 4 and Blank 5 . Round the bounds of the'mterval totwo decimal places {keep them as proportions; do not turn them into percents). Blink 486: Does the interval confirm that smoking has decreased lrom 1995 to 2010? YES OR NO Blank l: 1 :] Blank l: 2 :] Blank l: a :] Blank l: 4 :] Blank l: s :] Blank l: 5 :]
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