You turn on your tv and some bright spark is spitting out statistics of X amount of people surveyed say this and that. I find it amazing how you can actually work anything to proove your point.
Say you are doing a survey on how people survive on low incomes survive, and you want to show that people are doing well and dont have a problem, so your focus group is surveying upper class business people. You dont tell the public that, but your intel is flawed as they are clueless as to how it realy is. The people that need to know get all the paper work with numbers and percentages, but they are not actual proper study done with proper focus groups.
You can spin anything you like, its all in how it is presented.