Question

2. What does it mean to say that experimental conditions are controlled?

A. The null hypothesis is correct
B. There is no difference in outcome between the control and experimental treatment.
C. All physical conditions except for one are identical for all groups tested.
D. The test groups consist of the same individuals

Answer 1

In experimental design, controlled conditions mean that all physical conditions except for one are identical for all groups being tested.

Step-by-step explanation:

In experimental design, controlled conditions refer to the fact that all physical conditions except for one are identical for all groups being tested. This means that the experimental and control groups are treated the same in every aspect, except for the specific variable being manipulated in the experimental group. For example, in a study testing the effect of a weight-loss drug, the control group would receive a placebo instead of the drug, while all other conditions (such as diet and exercise) would be the same for both groups.