I was given this problem for my statistics homework and I don't know how to find the confidence interval based off of the margin of error. Any help would be greatly appreciated.
"Select 3 political polls and note the margin of error, sample size, and percentage favoring the candidate for each. For each poll, determine the level of confidence that must have been used to obtain the margin of error given, knowing the percentage favoring the candidate and the number of participants. Is there a pattern that emerges?"