In a random sample of 120 large retailers, 85 used regression as a method of forecasting. In an independent random sample of 163 small retailers, 78 used regression as a method of forecasting. Find a 98% confidence interval for the difference between the two population proportions.
Answer to relevant QuestionsRegulatory agencies and the U.S. Congress recognize both the values and emerging issues for small firms as the Sarbanes-Oxley Act of 2002 (SOX) is implemented. On April 23, 2006, the Advisory Committee on Smaller Public ...Independent random samples from two normally distributed populations give the following results: nx = 15 x-bar = 400 sx = 10 ny = 13 y-bar = 360 sy = 40 If we do not assume that the unknown population variances are equal, ...An agency offers students preparation courses for a graduate school admissions test. As part of an experiment to evaluate the merits of the course, 12 students were chosen and divided into six pairs in such a way that the ...Assuming equal population variances, determine the number of degrees of freedom for each of the following: a. nx = 16 s2x = 30 ny = 9 s2y = 36 b. nx = 12 s2x = 30 ny = 14 s2y = 36 c. nx = 20 s2x = 16 ny = 8 s2y = 25 A random sample of 1,562 undergraduates enrolled in management ethics courses was asked to respond on a scale from 1 (strongly disagree) to 7 (strongly agree) to this proposition: Senior corporate executives are interested ...
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