Which of the following is true of variables?
A) Variables must have at least two levels.
B) Some variables can only be measured.
C) Some variables can be either manipulated or measured.
D) All variables must have operational definitions.
E) All of the above are true.

Question

Quizplus · Accepted Answer

Variables can have multiple levels, some can only be measured, others can be manipulated or measured, and all variables should have operational definitions to ensure clarity in research.

Which of the Following Is True of Variables