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Unformatted text preview: Sample Problems for the Final Exam (Ch. 14, 15, 21 and 22) Statistics 110, Spring 2009 Page 1 of 5 Questions 1 6 are based on the following description: For a group of military inductees, the weight, x , and exercise capacity, y , were recorded for ten individuals. Use the output and scatterplot below to answer the following questions. Regression line: y = 44.9 0.11* x r 2 = 0.604 Scatterplot of Weight and Exercise Capacity 13 18 23 28 33 120 140 160 180 200 220 240 260 Weight (pounds) Exercise Capacity (# of situps) 1. What percent of the variation in exercise capacity is explained by a relationship with weight? A) 11% B) 77.7% C) 60.4% D) 44.9% 2. What is the value of the linear correlation coefficient? A) 0.604 B) 0.604 C) 0.777 D) 0.777 3. Describe the form, direction, and strength of the relationship between the two variables. A) There is a very weak negative linear relationship between weight and exercise capacity. B) There is a very weak positive linear relationship between weight and exercise capacity. C) There is a moderately strong negative linear relationship between weight and exercise capacity. D) There is a moderately strong positive linear relationship between weight and exercise capacity. Sample Problems for the Final Exam (Ch. 14, 15, 21 and 22) Statistics 110, Spring 2009 Page 2 of 5 REPEATED FROM PREVIOUS PAGE Questions 1 6 are based on the following description: For a group of military inductees, the weight, x , and exercise capacity, y , were recorded for ten individuals. Use the output and scatterplot below to answer the following questions. individuals....
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This note was uploaded on 06/13/2011 for the course STAT 110 taught by Professor Johnson during the Spring '07 term at South Carolina.
 Spring '07
 JOHNSON
 Statistics

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