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A sample is selected from a population with a mean of µ=80 and a standard deviation...

A sample is selected from a population with a mean of µ=80 and a standard deviation of σ=20. What is the expected value of the mean? Just put number. You do not have to put symbol in front of answer.

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Answer #1

given,

The expectation is the average value or mean of a random variable. As such it is for discrete random variables the weighted average of the values the random variable takes.

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