1. Suppose the proportion of women who follow a regularexercise progeam is Pw an
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1. Suppose the proportion of women who follow a regularexercise progeam is Pw and the proportion of men who follow aregular exercise program is Pm. A study found a 98% confidenceinterval for Pw-Pm is (0.027, 0.114). Give an interpretation ofthis confidence interval. A. We know that 98% of women exercise between 2.7% and 11.4%more than men. B. We know that 98% of all random samples done on thepopulation will show that the proportion of women who follow aregular exercise program is between 2.7% less and 11.4% more thanthe proportion of men who follow a regular exercise program. C. We know that 98% of men exercise between 2.7% less and11.4% more than women. D. We are 98% confident that the proportion of men who followa regular exercise program is between 2.7% less and 11.4% more thanthe proportion of women who follow a regular exerciseprogram. E. We are 98% confident that the proportion of women whofollow a regular exercise program is between 2.7% less and 11.4%more than the proportion of me who follow a regular exerciseprogram. 2. A marketing survey involves product recognition in NewYork and California. Of 558 New Yorkers surveyed, 193 knew theproduct while 196 out of 614 Californians knew the product.Construct a 99% confidenceinterval for the difference in theproportions of New Yorkers and Californians who knew theproduct. A. (-0.0443, 0.0976) B. (-0.0443,0.0566) C. (-0.0459, 0.0989) D. (-0.0034, 0.0566) E. (0.0247, 0.0286) 3. A sociologist develops a test to measure attitudes aboutpublic transportation, and 27 randomly selected subjects are giventhe test. Their mean score is 76.2 and their standard deviation is21.4. Construct the 95% confidence interval for the mean score ofall such subjects. A. (64.2, 88.2) B. (69.2, 83.2) C. (64.2, 83.2) D. (67.7, 84.7) E. (74.6, 77.8) 1. Suppose the proportion of women who follow a regularexercise progeam is Pw and the proportion of men who follow aregular exercise program is Pm. A study found a 98% confidenceinterval for Pw-Pm is (0.027, 0.114). Give an interpretation ofthis confidence interval. A. We know that 98% of women exercise between 2.7% and 11.4%more than men. B. We know that 98% of all random samples done on thepopulation will show that the proportion of women who follow aregular exercise program is between 2.7% less and 11.4% more thanthe proportion of men who follow a regular exercise program. C. We know that 98% of men exercise between 2.7% less and11.4% more than women. D. We are 98% confident that the proportion of men who followa regular exercise program is between 2.7% less and 11.4% more thanthe proportion of women who follow a regular exerciseprogram. E. We are 98% confident that the proportion of women whofollow a regular exercise program is between 2.7% less and 11.4%more than the proportion of me who follow a regular exerciseprogram. 2. A marketing survey involves product recognition in NewYork and California. Of 558 New Yorkers surveyed, 193 knew theproduct while 196 out of 614 Californians knew the product.Construct a 99% confidenceinterval for the difference in theproportions of New Yorkers and Californians who knew theproduct. A. (-0.0443, 0.0976) B. (-0.0443,0.0566) C. (-0.0459, 0.0989) D. (-0.0034, 0.0566) E. (0.0247, 0.0286) 3. A sociologist develops a test to measure attitudes aboutpublic transportation, and 27 randomly selected subjects are giventhe test. Their mean score is 76.2 and their standard deviation is21.4. Construct the 95% confidence interval for the mean score ofall such subjects. A. (64.2, 88.2) B. (69.2, 83.2) C. (64.2, 83.2) D. (67.7, 84.7) E. (74.6, 77.8)Explanation / Answer
1) E is the correct one. Interpretation: We are 98% confident that the proportion of women whofollow a regular exercise program is between 2.7% less and 11.4%more than the proportion of me who follow a regular exerciseprogram. 2) A is the correct answer (-0.0443227,0.0976425) 3) D is the correct answer (67.7344,84.6656)˜(67.7,84.7) 3) D is the correct answer (67.7344,84.6656)˜(67.7,84.7)Related Questions
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