Question

what is the independent variable in an experiment? the variable that is changed the variable being measured the control group the data collected

Explanation:

To determine the independent variable in an experiment, we analyze each option:

• The "variable being measured" is the dependent variable (it depends on the independent variable).
• The "control group" is a group not exposed to the independent variable, used for comparison, not the independent variable itself.
• "The data collected" is the result of measuring variables, not the independent variable.
• The independent variable is the one that the experimenter manipulates or changes to observe its effect on the dependent variable. So the option "The variable that is changed" matches the definition of an independent variable.

Answer:

The variable that is changed