Question

question 2
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which of the following statements is false about the principles of a good experiment?
considering (controlling) more variables in planning an experiment helps ensure each study group is similar to the other study groups.
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.
randomizing individuals into groups is one way of preventing accidental bias from creeping into a study.
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.
studying many observational units (e.g., including many patients in a study) is often more helpful than just including a few observational units in the study.
if we collect more information on each observational unit (e.g., take repeated measurements on each individual) that might be helpful to obtaining more precise results in an experiment.

Explanation:

Randomization alone is not sufficient to generalize study results to a greater population. Other factors like sample representativeness matter. A good experiment has multiple requirements for generalizability.

Answer:

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.