300
In a Pretest-Post-test Control Group Design:
R O1 X O2
R O1 O2
What are
R O1 X O2 - Random selection, First measurement of the dependent variable, Independent variable (intervention), and Second measurement of the dependent variable. (Experimental group)
R O1 O2- Random selection, First measurement of the dependent variable, No intervention, and Second measurement of the dependent variable.(Control group)