Versta Research Post

An Interactive Graph for Choosing Sample Size

A good chart is the best way to understand the law of diminishing returns when it comes to sample size.  So for our June 2011 newsletter we built an interactive graph for choosing sample size.  It’s cool, educational, and useful.  Moreover, it will show you just how mind boggling the numbers behind sampling can be. …

Versta Research Post

Online Surveys Have Same Accuracy as Phone

A new study presented by two professors from Harvard University and the University of Massachusetts at Amherst was probably one of the liveliest and potentially disruptive presentations at least week’s annual meeting of the American Association of Public Opinion Research (AAPOR) in Phoenix. Why?  Because their research challenges the beliefs of many AAPOR-ites who disregard…