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A concept which can take on different quantitative values is called a ....................

  • A.Control group
  • B.Hypothesis
  • C.Research design
  • D.Variable

Answer: D

Such a concept is a variable.

A variable is a characteristic that can take different values from one case to another, such as age, income, height or the number of children. Continuous variables can take any value in a range and discrete ones only whole values.

A control group is a group of subjects not given the treatment in an experiment. A hypothesis is a tentative statement about the relationship between variables. A research design is the overall plan of a study. None of them is a concept that takes different values.

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