The primary means scientists use to establish control in their observations is to
A) systematically manipulate an independent variable in an experiment.
B) train multiple observers.
C) establish the accuracy and precision of their measurements.
D) observe many dependent variables.

Question

Quizplus · Accepted Answer

Scientists establish control in their observations by systematically manipulating an independent variable in an experiment. This allows them to test the effects of the variable on the dependent variable while keeping all other factors constant. By controlling the independent variable, scientists can establish cause-and-effect relationships between variables.

The Primary Means Scientists Use to Establish Control in Their