The Mean of a Discrete Random Variable X

question 45

Multiple Choice

The mean of a discrete random variable x:

• A) is denoted by
• B) is denoted by E(x), because it is the value of x one can expect to find on average by numerous repetitions of the random experiment that generates the variable's actual values
• C) is correctly described by both "is denoted by" and "is denoted by E(x), because it is the value of x one can expect to find on average by numerous repetitions of the random experiment that generates the variable's actual values"
• D) is always = 0
• E) is none of these

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Definitions:

Schedule of Reinforcement

The plan for timing and frequency of reinforcement given to subjects in a conditioning experiment to establish or modify behavior.

Variable Ratio

A schedule of reinforcement where a response is reinforced after an unpredictable number of responses, promoting high and steady response rates.

Fixed Interval

A schedule of reinforcement where a response is rewarded only after a specified amount of time has elapsed, in behavior studies.

Punishment by Removal

A behavior modification technique involving the withdrawal of a desirable stimulus to decrease the likelihood of a behavior being repeated.