Exercise 10 - Expected Value and Standard Error of Poll 2

Now we define \(\bar{Y}_2\) as the average of poll results from the second poll.

What is the expected value and standard error of \(\bar{Y}_2\)?

50 XP

The expected value is \(d+b_2\) and the standard error is \(\sigma_2\)
The expected value is \(d\) and the standard error is \(\sigma_2/\sqrt{N_2}\)
The expected value is \(d+b_2\) and the standard error is \(\sigma_2/\sqrt{N_2}\)
The expected value is \(d\) and the standard error is \(\sigma_2+\sqrt{N_2}\)