Who has defined Ex-Post Facto Research by saying that it is a systematic scientific exploration in which the scientist (researcher) does not have direct control on the independent variable? [3011]

Q) Who has defined Ex-Post Facto Research by saying that it is a systematic scientific exploration in which the scientist (researcher) does not have direct control on the independent variable?

Options:
A)Fred Karlinger
B) George J. Mouly
C) John W. Best
D) W.S. Monroe.

Answer

A) Fred Karlinger

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