Philadelphia’s Sports Injury Center conducted a study to determine the relative effectiveness of four alternative rehabilitation programs designed for patients recovering from severe knee injuries. One of the variables used as an indicator of effectiveness is “number of days until the patient attains 75% of baseline lateral rotation.” Ten patients with similar injuries were randomly selected for each treatment. The partially completed tables below summarize results. Fill in the indicated missing values. Use the results to test a “no difference in average number of days” null hypothesis at the 5% significance level.
Answer to relevant QuestionsInformation Week’s National IT Salary Survey showed that IT (information technology) staff between the ages of 36 and 45 earned, on average, $67,000 per year. The average increased to $69,000 for IT staff between the ages ...Use a statistical calculator or Excel’s F.DIST.RT function to determine the proportion of values in an F distribution that are greater than a. 3.285, if numerator degrees of freedom = 4 and denominator degrees of freedom ...The Head Start Program offers early childhood education support for children up to age 5 from low income families. In a recent study of fifth graders, a sample of 1500 students was randomly selected from each of three ...From Exercise 10: A recent study of higher education measured the proportion of college students who work in off campus jobs for at least 20 hours a week. Four samples, each composed of 200 randomly selected students, were ...Hyper Inflation is a balloon wholesaler selling large variety packs of jumbo balloons that are supposed to contain 50% red balloons, 30% blue balloons, and 20% white balloons. You take a random sample of 200 balloons from ...
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