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Unformatted text preview: STA2014 Review For Exam 2 1.The data below are the nal exam scores of 10 randomly selected history students and the number of hours they slept the night before the exam. Suppose we want to predict the score of the exam using the hours slept the night before. Hours 3 5 2 8 2 4 4 5 6 3 Scores 65 80 60 88 66 78 85 90 90 71 a) What is the equation for the regression line? b) Interpret the slope of the line. c) Use the correlation coe cient and determine the relation between the variables. d) What is the determination coe cient? e) What would be the predicted score for a history student who slept 6 hours the previous night? Compute the residual if applicable and say whether it is above or below average. f) What would be the predicted score for a history student who slept 10 hours the previous night? Compute the residual if applicable and say whether it is above or below average. 2. There are 5 red balls, 7 purple balls, and 3 green balls in a box. One ball is randomly selected from this box.2....
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This note was uploaded on 07/28/2011 for the course STA 2014 taught by Professor Staff during the Fall '10 term at University of Florida.
- Fall '10