Question

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, 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?


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  • CreatedAugust 13, 2015
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