Kris works for the MESA Air Pollution Study at UW, and studies the correlation be- tween air pollution and the disease atherosclerosis. Nationally, 40% of adults suffer from atherosclerosis. Kris suspects that the proportion of people with atherosclerosis in high- pollution areas is higher. In a random sample of 600 residents of high-pollution areas, he finds that 270 (45%) subjects have atherosclerosis. At the 1% level (α = .01), is this good evidence that people in high-pollution areas are more likely to have atherosclerosis? (a) Which of the following is the Ha ? (research claim or alternate) A. Ha : p ≥ 0.40 B. Ha : pb ≥ 0.40 C. Ha : p > 0.40 D. Ha : p > b 0.40 E. Ha : p > b 0.45 F. Ha : p > 0.45 G. Ha : pb ≥ 0.45 H. Ha : p ≥ 0.45 I. None of these Hint: First read the problem and using my notes (or Hawkes) for 9.1, set up H0 and Ha . Then pick the right Ha from the above list. Dont try to guess the answer from the above list. (b) Which of the following is the correct formula to compute Test Statistic (TS)? A. Z= 0.40 − 0.45 p0.45(1 − 0.45)/600 B. Z = 0.45 − 0.40 p0.40(1 − 0.40)/600 C. Z = 0.45 − 0.40 r.45 × .55 600 D. None of these (c) What is the value of Test Statistic (TS)? (d) What is p-value? (e) Conclusion A. Reject H0 B. Fail to reject H0 f) Interpretation A. There is enough evidence (from data) in support of KRIS claim B. There is not enough evidence (from data) in support of KRIS clai

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

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ISBN:9780079039897

Author:Carter

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Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

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Kris works for the MESA Air Pollution Study at UW, and studies the correlation be- tween air pollution and the disease atherosclerosis. Nationally, 40% of adults suffer from atherosclerosis. Kris suspects that the proportion of people with atherosclerosis in high- pollution areas is higher. In a random sample of 600 residents of high-pollution areas, he finds that 270 (45%) subjects have atherosclerosis. At the 1% level (α = .01), is this good evidence that people in high-pollution areas are more likely to have atherosclerosis? (a) Which of the following is the Ha ? (research claim or alternate) A. Ha : p ≥ 0.40 B. Ha : pb ≥ 0.40 C. Ha : p > 0.40 D. Ha : p > b 0.40 E. Ha : p > b 0.45 F. Ha : p > 0.45 G. Ha : pb ≥ 0.45 H. Ha : p ≥ 0.45 I. None of these Hint: First read the problem and using my notes (or Hawkes) for 9.1, set up H0 and Ha . Then pick the right Ha from the above list. Dont try to guess the answer from the above list. (b) Which of the following is the correct formula to compute Test Statistic (TS)? A. Z= 0.40 − 0.45 p0.45(1 − 0.45)/600 B. Z = 0.45 − 0.40 p0.40(1 − 0.40)/600 C. Z = 0.45 − 0.40 r.45 × .55 600 D. None of these (c) What is the value of Test Statistic (TS)? (d) What is p-value? (e) Conclusion A. Reject H0 B. Fail to reject H0 f) Interpretation A. There is enough evidence (from data) in support of KRIS claim B. There is not enough evidence (from data) in support of KRIS claim

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