An "all possible regressions" search of a data set containing 9 independent variables will produce ___ regressions.
A)9
B)18
C)115
D)151
E)511

Question

Quizplus · Accepted Answer

The number of possible regressions from a set of n independent variables is equal to 2^n - 1. Therefore, for 9 independent variables, the number of possible regressions would be 2^9 - 1 = 511. Therefore, the correct answer is E, 511.

An "All Possible Regressions" Search of a Data Set Containing