Homework Help - Q&A from Onlir x WAMAP X G math 146 statistics - Google Sea X + X C A wamap.org/assess2/?cid=27415&aid=1412287#/full/page/5 . .. Are students more likely to use marijuana when their parents used drugs? The drug use data set contains a sample of 445 cases with two variables, student and parents, and is summarized below. The student variable is either uses or not, where a student is labeled as uses if she has recently used marijuana. The parents variable takes the value used if at least one of the parents used drugs, including alcohol. Parents used | Parents did not use Total Student uses 125 94 219 Student does not use 85 141 226 Total 210 235 445 a) Compute the row proportions. Parents used Parents did not use Total Student uses Student does not use Total b) Interpret the mosaic plot below. Is a student's marijuana use independent of their parents' drug use? Drug use between students and parents Student uses Student does not use Parents used ents 0 4:22* Homework Help - Q&A from Onlir x NEWAMAP X G math 146 statistics - Google Sea X + X C wamap.org/assess2/?cid=27415&aid=1412287#/full/page/6 . .. A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at nonacupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below. Pain free? Yes No Total Treatment Group 10 33 43 Control Group 2 4 46 Total 12 77 39 a) Compute the row proportions. Yes No Total Treatment Group Control Group Total b) Interpret the mosaic plot below. Are acupuncture treatments and migraine relief independent of each other? Acupuncture and Migraines Treatment Control Yes M O 1 7 0 4:33Homework Help - Q&A from Onlir x 4WAMAP X G math 146 statistics - Google Sear X + X C wamap.org/assess2/?cid=27415&aid=1412286#/full/page/6 . .. A sample of fifty observations is plotted in the histogram below. 12 10. 8 6 2 -30 -20 -10 10 20 30 Value a) How many observations are more than 10? b) What proportion of the observations is more than 10? c) How many observations are -15 or less? d) What proportion of the observations are -15 or less? Question Help: D Post to forum M 1 7 0 4:34Homework Help - Q&A from Onlir x NEWAMAP X G math 146 statistics - Google Sea X + X ( - C wamap.org/assess2/?cid=27415&aid=1412284#/full/page/15 . .. The infant mortality rate is defined as the number of infant deaths per 1,000 live births. This rate is often used as an indicator of the level of health in a country. The relative frequency histogram below shows the distribution of estimated infant death rates in 2012 for 222 countries. 0.375- 0.35 0.25- 0.22 0.12 0.125- 0.08 0.07 0.05 0.04 0.03 0.015 0.015 0.005 0.005 0.00 20 40 60 80 100 120 Use the histogram to estimate the following statistics. If a quartile or median is inside a bar, then use the midpoint of that bar as your answer. If a quartile or median is between two bars, then give an exact answer. . Q1 is about infant deaths per 1,000 live births. . The median is about infant deaths per 1,000 live births. . Q3 is about infant deaths per 1,000 live births. Question Help: D Post to forum Submit Question M 1 7 0 4:35
