In the paper “The Racial Crossover in Comorbidity, Disability, and Mortality” (Demography, Vol. 37(3), pp. 267–283), N. Johnson investigated the health of independent random samples of white and African-American elderly (aged 70 years or older). Of the 4989 white elderly surveyed, 529 had at least one stroke, whereas 103 of the 906 African-American elderly surveyed reported at least one stroke. At the 5% significance level, do the data suggest that there is a difference in stroke incidence between white and AfricanAmerican elderly?
Answer to relevant QuestionsResponse Insurance collects data on seatbelt use among U.S. drivers. Of 1000 drivers 25–34 years old, 27% said that they buckle up, whereas 330 of 1100 drivers 45–64 years old said that they did. At the 10% significance ...Refer to Exercise 11.90 and find and interpret a 95% confidence interval for the difference between the stroke incidences of white and African-American elderly. In exercise “The Racial Crossover in Comorbidity, Disability, ...In an issue of Parade Magazine, the editors reported on a national survey on law and order. One question asked of the 2512 U.S. adults who took part was whether they believed that juries “almost always” convict the ...N. Hill et al. conducted a clinical study to compare the standard treatment for head lice infestation with the Bug Buster kit, which involves using a fine-toothed comb on thoroughly wet hair four times at 4-day intervals. ...Explain how you would use Table V to find the two χ2-values that divide the area under a χ2-curve into a middle 0.95 area and two outside 0.025 areas. Find these two χ2-values for a χ2-curve with df = 14.
Post your question