Response is Sales
P
r
o
m
o
t
i
o
n Q
a u
P l a
r l
i e i
Mallows c x t
Vars R-Sq R-Sq(adj) Cp S e p y
1 81.3 79.8 6.1 7.8239 X
1 58.0 54.5 26.2 11.734 X
1 9.5 2.0 68.1 17.221 X
2 85.7 83.0 4.4 7.1630 X X
2 82.9 79.8 6.8 7.8193 X X
2 69.2 63.6 18.6 10.499 X X
3 88.4 84.9 4.0 6.7523 X X X
A) Excluding the combination that includes all the variables, which variables would you consider to include into the model based on Mallows Cp criterion?
B) If you want to consider a regression model with just one independent variable, which one would you include according to R-Sq(adj) criterion?