9.1 WS #2: Estimating a Population Proportion 1. Compute the margin of error, given the standard error and the confidence level (assume + z ): a. Standard Error = 6.7, Confidence Level = 88% b. Standard Error = 10.2, Confidence Level = 90% c. Standard Error = 56.4, Confidence Level = 99% 2. In advance of a national election, a large polling 100- agency pays to have 100 valid identical polls conducted about a particular issue. The following chart depicts 75 - the 100 confidence intervals, all drawn from the same population. P_inside a. How many of the 8 50 No polls did not Yes contain the true value of p = 0. 45? 25 b. An identical confidence level was used for all of these polls. What was this value? 0:40 0.44 0.45 0.52 estimate