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In: Statistics and Probability

2) Please answer questions A and B based on the following Best Subsets Regression. Best Subsets...

2) Please answer questions A and B based on the following Best Subsets Regression.

Best Subsets Regression: Sales versus Price, Promotional exp, Quality

Response is Sales

P

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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) If you want to consider regression models with just one independent variable, which variable would you consider to include into the model based on S criterion?

B) If you want to consider regression models with just two independent variables, which variables would you include according to R-Sq(adj) criterion?

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