For a simple experiment, which of the following is true?
A) As a null hypothesis, assume that the two groups represent different populations.
B) Apply the dependent variable to both groups and then measure the changes in the independent variable.
C) Find the probability that the two samples are from different populations by using a t distribution.
D) Treat both groups exactly alike except for one thing.

Question

Quizplus · Accepted Answer

In experimental design, to determine the effect of a variable, everything between groups should be kept constant except for the variable being tested. This ensures that any differences observed can be attributed to the variable of interest, not to other factors.

For a Simple Experiment, Which of the Following Is True