Which of the following best describes the expected value of a discrete random variable? Select one:...
Which of the following best describes the expected value of a discrete random variable?
Select one:
a. It is the weighted average over all possible outcomes.
b. None of the above
c. It is the simple average over all possible outcomes
d. It is the middle value of all possible outcomes
Homework Answers
The expected value of a discrete random variable can be regarded as the weighted average over all possible outcomes.
For exmple:
Let X be a random variable, and f(x) be its probability mass function, then ts expectation E(X) will be
Hence OPTION A is the correct option.
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