Missing data is one of the most common problems in survey research. It is also one of the most commonly mishandled. At first, missing data may seem like a minor inconvenience. A few respondents skipped a question. Some people started the survey but did not finish it. One scale has a handful of blank responses. Read More >

One of the most common questions students, researchers, and professionals ask when they begin analyzing their data is deceptively simple: What statistical test should I use? It sounds like there should be a quick answer. If you have two groups, use one test. If you have three groups, use another. If you have survey data, Read More >