ESP Report Sets Off Debate on Data Analysis - NYTimes.com

ESP Report Sets Off Debate on Data Analysis - NYTimes.com: "...if the true effect of what you are measuring is small,” said Andrew Gelman, a professor of statistics and political science at Columbia University, “then by necessity anything you discover is going to be an overestimate” of that effect.Consider the following experiment. Suppose there was reason to believe that a coin was slightly