An "all possible regressions" search of a data set containing "k" independent variables will produce __________ regressions.
A)2k -1
B)2k - 1..
C)k2 - 1.
D)2k - 1
E)2k

Question

Quizplus · Accepted Answer

An "all possible regressions" search includes all combinations of independent variables, including the empty set and the full set. Therefore, the number of possible regressions is equal to 2^k - 1 (excluding the empty set). This can also be written as 2k - 1. Choice D is the only option that matches this expression.

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