In a controlled experiment,____________.
A)the researcher has several hypotheses, one of which will be proven correct
B)you need only a single experimental organism which is tested again and again
C)the researcher knows the outcome before beginning the experiment
D)the researcher controls for the effects of only one variable
E)the researcher controls for the effects of all variables except one

Question

Quizplus · Accepted Answer

In a controlled experiment, the researcher controls for the effects of all variables except one to isolate the effect of the independent variable on the dependent variable.

In a Controlled Experiment,____________