Abuses and misuses of statistics are frequent. This digest attempts to warn against these in three broad classes of pitfalls: sources of bias, errors of methodology, and misinterpretation of results. Sources of bias are conditions or circumstances that affect the external validity of statistical results. In order for a researcher to make…

Since 1982, studies have shown statistical evidence that career and technical education (CTE) can play a role in reducing the number of high school dropouts, especially among students who are at high risk of dropping out. Case studies at several High Schools That Work sites showed improvements in retention and graduation at the same time that…