Question 4 (1 point) The researchers on a 1980 study measured the levels of carbon monoxide (or CO, in ppm) in 40 work areas where smoking was permitted and in another 40 work areas where smoking was not permitted. The data are given as: Work Area Mean Standard deviation Smoking permitted 11.6 7.3 Smoking not permitted 6.9 2.7 [Sourcez White, J. R., & Froeb, H. E. (1980). Small airway dysfunction in nonsmokers chronically exposed to tobacco smoke. New England Journal of Medicine, 302(13), 7207723.] mum.-. ..._.. ---a-~'--\" \"0...\"... V. .7............_, v-_'-'.,, . _- . -m, Suppose you are about to conduct a test of significance using the hypotheses H03 \"permitted\"not permitted = 0 VS- HA: \"permitted\"not permitted at 0- It is found from the test that the p-value is equal 0.0001. What would be the correct conclusion at O( = 1%? O A) The test is inconclusive. O B) At 0(=1%, there is no significant difference on the mean carbon monoxide levels in the work areas where smoking is permitted and is not permitted. 0 C) At 0(=1%, the mean carbon monoxide levels in the work areas where smoking is permitted is significantly higher than of the work areas where it is not permitted. 0 D) At 0(=1%, there is a significant difference on the mean carbon monoxide levels in the work areas where smoking is permitted and is not permitted. 0 E) At 0(=1%, the mean carbon monoxide levels in the work areas where smoking is permitted is significantly less than of the work areas where it is not permitted. Question 3 (1 point) The researchers on a 1980 study measured the levels of carbon monoxide (or CO, in ppm) in 40 work areas where smoking was permitted and in another 40 work areas where smoking was not permitted. The data are given as: Work Area Mean Standard deviation Smoking permitted 11.6 7.3 Smoking not permitted 6.9 2.7 [Sourcez White, J. R., & Froeb, H. E. (1980). Small airway dysfunction in nonsmokers chronically exposed to tobacco smoke. New England Journal of Medicine, 302(13), 7207234] Suppose you are about to conduct a test of significance using the hypotheses O Ho: Mpermitted Mnot permitted = O VS. HA: Hpermitted Mnot permitted * 0. Which of the following is the correct test statistic and degrees of freedom (df), if applicable? ( A) Z = 3.82; no df O B) Z = 9.4; no df O C) t = 3.82; no df O D) Z = 18.8; df = 39 O E) Z = 3.82; df = 39