Exercise 3. Polling - expected value of X-bar
Consider the random variable \(S/N\), which is equivalent to the sample average that we have been denoting as \(\bar{X}\). The variable \(N\) represents the sample size and \(p\) is the proportion of Democrats in the population.
What is the expected value of \(\bar{X}\)?
This exercise is part of the course
HarvardX Data Science Module 4 - Inference and Modeling
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