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A researcher obtains a list of all prisons in the U.S. She draws a random sample of 75 of the prisons on this list. She then obtains a list of all inmates from the warden at each of the 75 prisons and interviews a random sample of 30 inmates at each prison. This is a:

The National Crime Victimization Survey selects subjects by identifying rural counties or metropolitan areas as primary sampling units

By definition

What type of measures are used to study groups or individuals without their knowledge?

A variable’s level of measurement indicates:

An experimental study has found that alcoholics who attend peer group meetings are more successful in reducing their consumption of alcoholic beverages than alcoholics who do not attend such meetings. In the conclusions to their report on this experiment

Mechanism and context are necessary conditions for determining causality.

Researchers apply the term face validity to the confidence gained from:

Which of the following is not a property of a variable measured at the interval level?

Alternate forms reliability is different than test-retest reliability because: