Morg toanother qu ion wil save this response. Question 30 Question 30 3.14288 po

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Morg toanother qu ion wil save this response. Question 30 Question 30 3.14288 points In ganoral, for a frted regression model what does adusteod r-squared do that regulert rsquared does not? ?b.lt always gets larger as more X variables an added to the Oc.It accounts for the number of X variables in the model, giving us a penalty for indluding X variables that are mot Od. It allows us to conduct the model F test directly without using SSTot. Oe. It tells us the increase on the mean of Y for a one-unit increase in X, holding a model, whother the variables are useful or not all other variables fixed Moving to another question will save this response ??Question 30 MacBook Pro

Explanation / Answer

R squared will always increase with the increase in the number of X variables(i.e. decrease in the degree of freedom of the model)

Whereas, adjusted R squared is inversely proportional to the number of X variables.

As the number of X variables increases, adjusted r squared will decrease accounting for the loss of degree of freedom and thus reduced power in the model provided everything else is held constant.

Therefore, if a useful variable is included adjusted R squared will increase and if useless variables are added, it will decrease.

Hence, option c is appropriate

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