ACMS 30600 Exam 2 Questions & Answers 2024/2025

ACMS 30600 Exam 2 Questions & Answers 2024/2025 R-squared is a good measure of power for a model only if the sample size is considerably larger than the number of predictors in the model. A. True B. False - ANSWERSA. True The slope estimate for an indicator variable for "color_pink" came out to be 22. What does this value mean? A. The value of y will be 22 when pink is included in the model. B. The value of y will be 22 more than the baseline when color is included in the model. C. The value of y will be 22 more than the baseline when someone chooses pink for the variable color. D. 22 people like the color pink. - ANSWERSC. The value of y will be 22 more than the baseline when someone chooses pink for the variable color. What are the effects of multicollinearity in our model? A. It will artificially inflate the standard errors of the parameter estimates. B. It will decrease the value of our test statistics. C. It will increase the value of our p-values. D. All of the above - ANSWERSD. All of the above (artificially inflates standard errors, decreases value of test statistics, increases value of p-values) What is MSE? A. the mean standard error B. the estimated random error variance C. sum(y_i - yhat_i)^2 / (n - (k + 1)) D. All of the above - ANSWERSD. All of the above (mean standard error, estimated random error variance, sum(y_i - yhat_i)^2 / (n - (k + 1)))