The three principles of designing experiments are to control, randomize, and rep

Question

The three principles of designing experiments are to control, randomize, and replicate. Which of the following statements is NOT true about these important principles?

A) Considering (controlling) more variables in planning an experiment helps ensure each study group is similar to the other study groups.

B) Using a control group with a placebo is important since otherwise subjects in the control group may behave differently than those in the treatment group.

C) Randomizing individuals into groups is one component to prevent accidental bias from creeping into a study.

D) We can always generalize the result of a study to the greater population so long as we randomize which patients go into which study groups.

E) Studying many cases (e.g. including many patients in a study) is often more helpful than just including a few cases in the study.

F) If we collect more information on each case (e.g. take repeated measurements on each individual) that might be helpful to obtaining more precise results in an experiment.

Explanation / Answer

Ans: The following statements is NOT true about these important principles is

B) Using a control group with a placebo is important since otherwise subjects in the control group may behave differently than those in the treatment group.

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