Which of the Following Statements Is False? ​

Multiple Choice

Which of the following statements is false? ​

A) The explanatory variables are those variables that have values that are controlled by the experimenter.
B) The response variable is the variable that the experimenter thinks may be affected by the explanatory variables.
C) An experimental unit is the smallest entity to which a treatment is applied.
D) Two variables are confounded if their effects on the response variable can be distinguished.
E) An experiment in which experimental units are randomly assigned to treatments is called a completely randomized experiment.