Which of the Following Are Accurate Statements About Study Variables

Which of the following are accurate statements about study variables and research concepts? Select all that apply.

A) Variables are qualities,properties,or characteristics of persons,things,or situations that do not change or vary.
B) Research concepts are usually studied in quantitative research,are at lower levels of abstraction than variables,and are not measured or manipulated.
C) Some variables are manipulated; others are controlled.
D) A dependent variable is the outcome that the researcher wants to predict or explain.
E) Operational definitions provide the theoretical meaning of a variable and are derived from a theorist's definition of a related concept.

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