The city of Streetville is considering adding bike lanes to some of its most popular roads in hopes to offer an alternative travel mode for local residents. The city wants to survey Streetsville residents to get their opinion about using tax dollars for this purpose, as it will require a 1% local-option tax increase. If a majority (more than 50%) are in favor, the city will move ahead with its plan. Suppose the city officials contacted all bicycle shops in the city for a list of customers to mail their survey to. Of the 2,550 surveys that were mailed out, 84% were completed and returned. Of those who responded, 54% were in favor of the tax increase to add new bike lanes. The day after the results were in, a headline in the local paper read, The Majority of Streetville Residents Support Adding Bike Lanes. What was the population for this study