Question

Select the statement that expresses an approach used with experiments.

a.) the researcher controls some of the variables.
b.) the researcher cannot control any of the variables.
c.) the researcher controls exactly one variable.
d.) the researcher must control all of the variables.

Answer 1

that in an experiment, the researcher controls some of the variables to maintain strict conditions. Controlled variables are kept constant while the independent variable is manipulated to observe its effect on the dependent variable.

Step-by-step explanation:

The researcher controls some of the variables. This approach is essential to maintain the strict conditions of an experiment.

In scientific research, especially in experiments, it's crucial to have a controlled experiment where the researcher manages certain variables. The idea is to isolate the independent variable, which the researcher manipulates, to observe its effects on the dependent variable. Other variables, known as control or controlled variables, are kept constant so they don't affect the experiment's outcome. This level of control allows for a comparison between different treatment groups, such as the experimental group and the control group. The control group is subjected to all the same conditions as the experimental group, except for the manipulation of the independent variable. By analyzing the results, researchers can make causal inferences about the relationship between variables, leading to valuable scientific insights.