For the regression equation given in Exercise 1, the P-value is 0.000 and the adjusted R2 value is 0.925. If we were to include an additional predictor variable of neck size (in.), the P-value becomes 0.000 and the adjusted R2 becomes 0.933. Given that the adjusted R2 value of 0.933 is larger, is it better to use the regression equation with the three predictor variables of length, chest size, and neck size? Explain.
Answer to relevant QuestionsFor Exercise 2, why is it better to use values of adjusted R2 instead of simply using values of R2? If only one predictor (x) variable is used to predict the city fuel consumption, which single variable is best? Why? Refer to the accompanying table, which was obtained using the data from 21 cars listed in Data Set 14 in ...Refer to Data Set 5 in Appendix B and find the best regression equation with IQF (full IQ score) as the response (y) variable. Use predictor variables of IQV (verbal IQ score) and IQP (performance IQ score). Why is this ...The table lists the cost y (in dollars) of purchasing a volume of red landscaping mulch from the Red Barn Farm and Nursery in Dutchess County, New York. The mulch is sold by the “yard,” which is actually a cubic yard, ...Listed below in order by row are the annual high values of the Dow Jones Industrial Average for each year beginning with 1990. Use only the first 10 values (for 1990— 1999) to find the best model and then predict the value ...
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