To be valid,an experiment must not include
A)a variable that is altered in a specific way.
B)a control.
C)both a control and a variable,which are treated in parallel.
D)only one variable.
E)more than one variablE.

Question

Quizplus · Accepted Answer

A valid experiment should only have one variable that is altered and all other factors should be controlled. In other words, there should only be one factor that is being tested or manipulated. Including more than one variable can lead to confounding variables and invalid results.

To Be Valid,an Experiment Must Not Include