Learn how the simple formula for ROI can help you identify winning investments and make smarter investment decisions.

If you've ever found yourself copying the same formula down hundreds of rows in Excel, you know how tedious it gets. The usual approach, dragging formulas, adjusting cell references, and hoping ...

The best way to do this is by converting your data to an Excel table. Select your data range (A1:E11), press Ctrl + T, and click OK. Excel names it something like "Table1"; in my case, it's Table3, ...

Dr. James McCaffrey presents a complete end-to-end demonstration of linear regression with two-way interactions between predictor variables. Standard linear regression predicts a single numeric value ...

At the heart of all lithium-ion batteries is a simple reaction: Lithium ions dissolved in an electrolyte solution "intercalate" or insert themselves into a solid electrode during battery discharge.