Using the lengths in chest sizes in and weights lb of bears from a data set the resulting regression equation is Weight 274 0

Question

Using the lengths in chest sizes in and weights lb of bears from a data set the resulting regression equation is Weight 274 0 426 Length 12 1 Chest Size The P value is 0 000 and the adjusted R value is 0 925 If an additional predictor variable of neck size in is included the P value becomes 0 000 and the adjusted R becomes 0 933 Why is it better to use values of adjusted R instead of simply using values of R Choose the correct answer below OA The unadjusted R decreases or remains the same as more variables are included but the adjusted R is adjusted for the number of variables and sample size OB The unadjusted R increaseslor remains the same as more variables are included but the adjusted R is adjusted for the number of variables and sample size OC The unadjusted R can only be calculated for regression equations with P values greater than 0 while the adjusted R can be calculated for regression equations with any manner of P value OD The unadjusted R can only be calculated for regression equations with two or fewer predictor variables while the adjusted R can be calculated for regression equations with any number of predictor variables

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