Exercise

Exercise 1. Polling - expected value of S

Suppose you poll a population in which a proportion \(p\) of voters are Democrats and \(1-p\) are Republicans. Your sample size is \(N = 25\). Consider the random variable \(S\), which is the total number of Democrats in your sample.

What is the expected value of this random variable \(S\)?

Instructions

50 XP

Possible answers