Question

13. The data in Table 6-27 are collected in a randomized trial to test the efficacy of a new drug for migraine headaches. The following are characteristics of study participants overall and then organized by the treatment to which they are assigned TABLE 6-27Characteristics in Participants in Study of Treatment for Migraine Headaches All (n- 200) Placebo (n 100) New Drug (n 100) 32.0 (4.9) 31.9 (5.1) 32.8 (4.7 Mean (SD) age, years 51% 48% 54% % Male 78% 80% 76% % High school graduate Severity of migraine headaches 21% 20% 2296 % Mild 39% 42% 38% 96 Moderate 39% 38% 40% 96 Severe 6 (3-17) 6 (2-18) Median (Q1-Q3) number of days missed work in past year due to migrane 5 (3-12) 0-48 0-48 Min-Max number of days missed work in past year due to migraine 0-35 a. Generate a 95% confidence interval for the difference in mean ages between groups b. Generate a 95% confidence interval for the difference in proportions of males between groups c. Generate a 95% confidence interval for the difference in proportions of patients with severe migraine headaches between groups

Answer 1

dlitference is mean age betuseem 서끼 ½ males between (ls)tor di 시끼 ニ(0,Sy_o.ye)土1.96¥| 0S4*0。yc + o.ye (Φ CD 0.06 ±0.138 evits uurith ewere mpaie headaches betwen ±之 = 0.oa. + ο。 (35