:1. Solution. The estimate for the average is 10,000/100 = 100. To get the SE of this estimate, we first need the SE of the sum of 100 draws. This SE of this estimate is (the box SD) x 100. We don't know the box SD, so we use the sample SD as a "bootstrap" estimate for it, and obtain for the SE of the sum of the draws 20 x 10 = 200. To get the SE for the average of the 100 draws we divide this by 100, getting 2. The upper limit of a 95% confidence interval is two SE's above the average, or 100 + (2X2) = 104.