Problem 6.3.27 gives you some summary data about a survey and asks you to find the confidence interval for the population proportion if the margin of error, E, is also given. Although you can do this problem using StatCrunch, I find it to be one of those problems where Excel is quicker and easier, particularly if you use my “calculator.” Enter your summary data and the E. Find the answers in the yellow cells below. You may also download a copy of this workbook.

Download a copy Confidence Level for Proportion CI V1.00