It has a sophisticated but easy-to-use interface that is designed to take maximum advantage of the interactivity and multiple dimensions of the Excel environment, with some unique features to support teaching and grading as well as to make your own analysis easier and more enjoyable. I developed it for use in an advanced course on regression and time series forecasting taught to MBA's and grad students in other programs at Duke, and it is also intended for wider use in teaching (including introductory courses, workshops, and webinars) as well as in applications. A quick overview of RegressIt's features can be found in this set of slides:
Whether or not you are fond of Excel as a tool for data analysis, please read on, particularly if you are an R user. A new version of RegressIt, a very powerful and user-friendly Excel add-in for multivariate descriptive analysis and linear and logistic regression, is available for free at this web site:
