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Chapter 10 HW

Chapter 10 HW - Chapter 10 For Problems 1-3 use the...

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Chapter 10 For Problems 1-3, use the following information for students in a certain class. Average weight: 150 pounds SD for weight: 20 pounds Average height: 68 inches SD for height: 2.5 inches Correlation ( r ): 0.6 1. a) Write the regression equation for weight on height (that is, the line that estimates weight when height is given). b) Use the equation to estimate the average weight of students who are 64 inches tall. c) If we randomly select a student and find she is 64 inches tall, what weight should we predict her to have? 2. a) Write the regression equation for height on weight (that is, the line that estimates height when weight is given). b) Use the equation to estimate the average height of students who weigh 170 pounds. c) If we randomly select a student and find he weighs 170 pounds, what height should we predict him to have? 3. a) Use the above information to sketch a rough scatter plot of height vs. weight. Plot the point of averages and sketch the SD line.

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