What May NOT Be Said About the Mean of a Discrete

question 1

Multiple Choice

What may NOT be said about the mean of a discrete random variable x?

• A) It is denoted by.
• B) It is the middle value of its probability distribution.
• C) It 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) It is correctly described by both (a) and (b).

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