A study in Physical Therapy reports on seven different methods to determine proper crutch length plus two new techniques using linear regression. One of the regression techniques uses the patient’s reported height. The study included 107 individuals. The mean of the self-reported heights was 68.84 inches. The regression equation determined was y = 0.68x + 4.8 where y = crutch length and x = self-reported height. The MSE was reported to be 0.50. In addition, the standard deviation of the self-reported heights was 7.35 inches. Use this information to determine a 95% confidence interval estimate for the mean crutch length for individuals who say they are 70 inches tall.
Answer to relevant Questionsa. Construct a scatter diagram of the following bivariate data. b. Calculate the covariance. c. Calculate sx and sy. d. Calculate r using formula (13.2). e. Calculate r using formula (13.3). Use the “Married Couples’ Heights” data and the answers found in Exercise 13. 65 to make the following estimates. a. Give a point estimate for the mean husband height for a wife height of 59 inches. b. Give a 95% ...About 11,028 athletes competed in the 2008 Summer Olympic Games held in Beijing, China, for medals in over 300 events. Athletes from 204 nations and territories participated. The table below shows the distribution of gold, ...The following set of 25 scores was randomly selected from a teacher’s class list. Let x be the pre-final average and y be the final examination score. (The final examination had a maximum of 75 points.) a. Draw a scatter ...An article titled “Graft-versus-Host Disease” (http://www.nature.com/) gives the median age of 42 years for the 87 patients with acute myeloid leukemia (AML) who received hematopoietic stem cell transplants from ...
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