Consider the Following Frequency Distribution

question 52

Multiple Choice

Consider the following frequency distribution. The total number of observations in the frequency distribution is ______.

• A) 5
• B) 6
• C) 20
• D) 24

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Definitions:

Placebo Effect

The phenomenon that occurs in an experiment when a participant’s response to a treatment is due to his or her expectations about the treatment rather than to the treatment itself.

Sugar Pill

A placebo, often used in medical trials to test the efficacy of new drugs by comparing their effects to those of an inert pill.

Drowsy

A feeling of being sleepily tired and lethargic, not fully awake, often as a prelude to falling asleep.

Random Assignment

The process of selecting participants for experimental and control groups by using a chance procedure to guarantee that each participant has an equal probability of being assigned to any of the groups; a control for selection bias.