Exhibit 5-8 the Random Variable X Is the Number of Occurrences of Occurrences

question 80

Multiple Choice

Exhibit 5-8
The random variable x is the number of occurrences of an event over an interval of ten minutes. It can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. It is known that the mean number of occurrences in ten minutes is 5.3.
-Refer to Exhibit 5-8. The expected value of the random variable x is

• A)2
• B)5.3
• C)10
• D)2.30

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Definitions:

Empirically Keyed Test

A type of self-report test that presents many questionnaire items to two groups that are known to be different in some central way.

Self-report Test

A type of psychological test in which a person fills out a survey or questionnaire with or without the help of an investigator, providing data on their feelings, beliefs, and behaviors.

Personality

The amalgamation of qualities and characteristics that distinguish one's personal identity.

Projective Tests

Projective tests are psychological assessments that involve presenting individuals with ambiguous stimuli, prompting them to project their own perceptions, emotions, or attitudes onto the material.