Question

question 4 of 10
which of the following describes an independent variable?

a. the factor in an experiment that is deliberately kept the same
b. the factor in an experiment that is deliberately changed
c. the factor in an experiment that responds to the manipulated variable
d. the factor in an experiment that is not under observation

Explanation:

To determine the correct option, we analyze each choice based on the definition of an independent variable:

• Option A: The factor kept the same is a controlled variable, not an independent variable.
• Option B: The independent variable is the one that the experimenter deliberately changes to observe its effect on other variables. This matches the definition.
• Option C: The factor that responds to the manipulated variable is the dependent variable.
• Option D: A factor not under observation is not relevant to the definition of an independent variable.

Answer:

B. The factor in an experiment that is deliberately changed