# B choose the correct graph below a 11 9 x y b 11 9 x

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(b) Choose the correct graph below. A.01109xyB.01109xyC.09011xyD.09011xyFor the data set below,(a) Determine the least­squares regression line.(b) Compute the sum of the squared residuals for the least­squares regression line. x 20 30 40 50 60 y 77 77 74 67 59 (a) Determine the least­squares regression line.x(Round to four decimal places as needed.) (b) The sum of the squared residuals is .(Round to two decimal places as needed.)
1/18/2017 4­2 MyMathLab Problem Set: Module Four­Cynthia McDonald 11/16 12.An author of a book discusses how statistics can be used to judge both a baseball player's potential and a team's abilityto win games. One aspect of this analysis is that a team's on­base percentage is the best predictor of winningpercentage. The on­base percentage is the proportion of time a player reaches a base. For example, an on­basepercentage of 0.3 would mean the player safely reaches bases 3 times out of 10, on average. For a certain baseballseason, winning percentage, y, and on­base percentage, x, are linearly related by the least­squares regression equationx. Complete parts (a) through (d).y = 2.94− 0.4875(a) Interpret the slope. Choose the correct answer below. (b) For this baseball season, the lowest on­base percentage wasand the highest on­base percentage was. Does it make sense to interpret the y­intercept? (c) Would it be a good idea to use this model to predict the winning percentage of a team whose on­base percentage was? (d) A certain team had an on­base percentage ofand a winning percentage of. What is the residual for thatteam? How would you interpret this residual? The residual for the team is. (Round to four decimal places as needed.)How would you interpret this residual?
1/18/2017 4­2 MyMathLab Problem Set: Module Four­Cynthia McDonald 12/16
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