The population of Wichita, KS is about 7 times larger than that of Manhattan, KS. A poll of 400 voters was taken in Manhattan to find out who they would vote for in the upcoming election. The pollsters reported a margin of error of 5 percentage points. To have the same margin of error for the same poll taken in Wichita, approximately how large a sample should we take? 400 (same size as poll in Manhattan) 2800 (7 times the poll size in Manhattan) Because a sample of 400 is 10% of the Manhattan population, we ought to take a sample of 10% of the Wichita population (about 3500).