Google Spreadsheet Add-on for Classical Item and Test Analysis This add-on allows you to quickly generate all the Classical Item and Test Analysis statistics, reports and charts easily with only a few clicks. With add-on you can easily perform complete item analysis procedure and evaluate the quality of exams. The add-on computes both item and test level statistics. Some of these statistics are listed below: Mode Median Mean Std.Dev. Variance Skew Kurtosis KR-20 SEM Difficulty Index Discrimination Index