Which of the Following About the Normal Distribution Is Not

question 139

Multiple Choice

Which of the following about the normal distribution is not true?

• A) About 2/3 of the observations fall within ±1 standard deviation from the mean.
• B) It is a discrete probability distribution.
• C) Its parameters are the mean, µ, and standard deviation, a.
• D) Theoretically, the mean, median, and mode are the same.

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Definitions:

Independent Variable

The variable in an experiment that is manipulated or changed by the researcher to observe its effects.

Flossing Frequency

The recommended regularity of cleaning between teeth with dental floss to prevent gum disease and dental decay.

Gum Disease

A set of inflammatory conditions affecting the tissues surrounding the teeth, which can lead to redness, swelling, and in severe cases, tooth loss; also known as periodontal disease.

Incidence

The rate or frequency at which a new event or case occurs in a specific population over a certain period of time.