Continuing with the example from Practice 7.2, suppose you find the regression equation for predicting life satisfaction from time spent exercising the study is Y ′ = .059X + 34.5.
• Using this regression equation, what would the predicted life satisfaction score be if someone spends 120 minutes a week exercising?
• What is the coefficient of determination for the study? (Refer to Practice 7.2 for the value you need to answer this question.) What does this number tell you?
• If the life satisfaction scale ranges from 10 to 70 and you find that the standard error of the estimate sy = 10.27, would you expect a large or small amount of error in your predictions of life satisfaction?