Exercise 9 - Expected Value and Standard Error of Poll 1

Suppose we define \(\bar{Y}_1\) as the average of poll results from the first poll and \(\sigma_1\) as the standard deviation of the first poll.

What is the expected value and standard error of \(\bar{Y}_1\)?

50 XP

The expected value is \(d+b_1\) and the standard error is \(\sigma_1\)
The expected value is \(d\) and the standard error is \(\sigma_1/\sqrt{N_1}\)
The expected value is \(d+b_1\) and the standard error is \(\sigma_1/\sqrt{N_1}\)
The expected value is \(d\) and the standard error is \(\sigma_1+\sqrt{N_1}\)