Visit http://www.TeachMsOffice.com for more, including Excel Consulting, Macros, and Tutorials.
Learn how to install add-ins in this Excel video tutorial. You will learn how to install add-ins such as the Analysis Toolpak and Solver in Excel. This is a very good tutorial to learn if you just upgraded to Excel 2007 or just need to find out where to install add-ins in Excel.
Installing the Analysis toolpak will allow you to perform regression analysis and t-stat and anova analysis in Excel in a much more efficient fashion than just using functions such as LINEST().
For Excel consulting, classes, or to get the spreadsheet or macro used here visit the website http://www.TeachExcel.com There, you can also get more free Excel video tutorials, macros, tips, and a forum for Excel.
Have a great day!