Ch. 12 review

# Ch. 12 review - Chapter 12 Review 1 Interpret the results...

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Chapter 12 Review 1. Interpret the results of a linear regression analysis. Write the equation of the least-squares regression line. Interpret the slope and y-intercept in context. Interpret the R 2 value. Interpret the RMSE value. Calculate the predicted value ^ y and the residual for a given x . Check the assumptions for inference. Conduct a significance test for β . o Test for an association, H 0 : β = 0 , or for other values of the slope, H 0 : β = β 0 . o Explain what the p-value represents (the p-value is the probability of what, assuming what?) o Explain how the t-test and the F-test are related. Calculate and interpret a confidence interval for β . o Explain how confidence intervals and significance tests are related. Using the ANOVA table… o Fill in missing values o Calculate R 2 o Calculate an F statistic. Explain the difference between a confidence interval for μ y and a prediction interval for a new

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