Q1 0.5 Points Which of the following is the correct formula to find the coefficient of determination of a model using 3 explanatory variables? O SSReg SSTotal O MSReg MSTotal O SSReg SSETTOT O MSReg MSError Save Answer Q2 0.5 Points In the ANOVA F test for a single model, what are the null and alternative hypotheses in words? O Ho: The model is not the best in predicting the response vs. Ha: The model is the best in predicting the response O Ho: The model is the best in predicting the response vs. Ha: The model is not the best in predicting the response O Ho: The model is not useful in predicting the response vs. Ha: The model is useful in predicting the response O Ho: The model is useful in predicting the response vs. Ha: The model is not useful in predicting the response03 0.5 Points In the ANOVA F test for a partial model. what are the null and alternative hypotheses in words? 0 Ho: The extended model is not the best in predicting the response vs. Hg: The extended model is the best in predicting the response 0 Ho: The extended model is the best in predicting the response vs. Hg: The extended model is not the best in predicting the response 0 Ho: The extended model is not more useful in predicting the response vs. Ha: The extended model is more useful in predicting the response 0 Ho: The extended model is more useful in predicting the response vs. Hg: The extended model is not more useful in predicting the response Save Answer 05 0.5 Points When the null hypothesis of any F test is rejected. it is appropriate to conclude that all of the variables being tested are useful. 0 True 0 False Save Answer 06 0.5 Points Which of the following statements is true? 0 R2 should always be used to choose between two models. 0 Using R2 as a criterion to add variables to a model will always result in adding useful explanatory variables. 0 The 32 of the extended model is never larger than the R2 of the original model. 0 The R2 of the extended model is never smaller than the R2 of the original model. Save Answer 07 0.5 Points 38369 + SSE'T'!' = SSTotal 0 True 0 False Q8 0.5 Points MSReg + MSErr = MSTotal O True O False Save Answer Q9 0.5 Points The F Distribution is: Just another name for the chi-square distribution Right-skewed Left-skewed Defined by specifying k, the degrees of freedom Defined by specifying 1 and 2, the two sets of degrees of freedom Save
