Question

Help The rule for controls is that _____.

A. controls are only necessary if you're not doing an experiment

B. everything should remain the same between experimental groups

C. there should be only one independent variable and one dependent variable

D. the only change we make between experimental groups is to the independent variable

Answer 1

i think the answer is B

Answer 2

B. everything should remain the same between experimental groups

Step-by-step explanation:

The control group, in one experiment, is characterized by individuals who will not receive the factor being tested in the experiment, but will also be evaluated at the same time points as the subjects in the intervention group. For example, if you have bean plants and want to do an experiment where you will evaluate the effectiveness of a fertilizer on bean plants, you will apply fertilizer on 9 bean plants while one plant will be maintained without fertilizing it. However all plants will be treated the same (except for fertilizer application) and will be evaluated in the same way. The fertilizer is the factor that is being tested in the experiment, the plant that did not receive it is the control group.