Ch. 13 review

# Ch. 13 review - Chapter 13 Review Exam 1 covers chapters 12...

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Chapter 13 Review Exam 1 covers chapters 12 and 13. In addition to the Ch. 12 review checklist, review the Ch. 13 topics below. 1. Interpret the results of a linear regression analysis with multiple quantitative predictors. A regression analysis was conducted to study the relationship between ? = weight (in pounds), ? 1 = height (in inches), ? 2 = percent body fat, and ? 3 = body mass index in a sample of high school athletes. * Write the equation of the least-squares regression line. Interpret the y-intercept and the slope for each predictor in context. Sketch a scatterplot that illustrates the assumption of a straight-line relationship between 𝜇 𝑦 and each predictor, “holding all other predictors constant”. Interpret the multiple correlation, R. Interpret R 2 . o How does the R 2 value change when more predictors are added? Interpret the RMSE. Calculate the predicted value ? ̂ and the residual for a given ? .

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