Scores on a Test Range from 12 to 90, with a Mean

question 27

Multiple Choice

Scores on a test range from 12 to 90, with a mean of 60 and a standard deviation of 10. If a particular participant scored 40 on the test, his z-score would be

• A).40.
• B)-.10.
• C)-2.0.
• D).70.

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Definitions:

Placebo

A substance or treatment with no therapeutic effect, often used in clinical trials as a control to test the efficacy of new drugs.

Inflammation

A biological response of body tissues to harmful stimuli, characterized by redness, swelling, warmth, and pain.

Single Blind

An experimental setup where the participant is unaware of whether they are receiving the experimental treatment or are in the control group, but the researchers are aware.

Lurking Variables

Unobserved variables that can influence the observed relationship between other variables of interest.