Arnold Is Extremely Frightened of Grasshoppers, Jeff Is Overly Fearful

question 270

Multiple Choice

Arnold is extremely frightened of grasshoppers, Jeff is overly fearful of lightning and thunder, and Igor is afraid of the dentist. All three suffer from

• A) specific phobias.
• B) agoraphobia.
• C) complex phobias.
• D) social anxiety disorders.

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Definitions:

Null Hypothesis

A theory proposing that there's no meaningful statistical distinction between the two variables under consideration in the hypothesis.

Rejection Region

The area in a statistical test's distribution which, if the test statistic falls within, leads to the rejection of the null hypothesis.

Standard Deviation

An index showing the degree of spread or deviation from the mean within a data collection.

Confidence Level

The probability, expressed as a percentage, that the calculated confidence interval actually includes the true population parameter.