With Enough Variables, It Is Possible to Get an Rs1u1p12s1s1p0
With enough variables, it is possible to get an R2 value close to 1, even if the variables have no particular meaning in the model.
If there are three independent variables x1, x2, and x3 available, then the value of R2 for a multiple regression of y using x1, x2, and x3 will always be smaller than the value of r2 for a multiple regression of y using just x1.
A multiple regression line was calculated in which x1 was a student's grade point average and x2 was a student's age. The multiple regression line was calculated as . If a student has a grade point average of 5.9 and is 20 years old, what is the predicted value of ?
In a multiple regression model y' = -11 + 4x1 + 11x2 + 7x3 + 3x4, if the value of x2 increases by 2 and the value of x3 decreases by 5, then the predicted value for y will
A) decrease by 57.
B) increase by 57.
C) decrease by 13.
D) increase by 13.