In Microsoft Excel, using a scatter chart allows you to plot the data points against the probability of achieving each observed data point.

It's easy to turn an Excel chart into a visually compelling object. Susan Harkins walks through the steps for jazzing up data points with a simple formatting trick.

Prevent duplicates before they happen by combining a simple function with data validation. Excel has built-in tools to expose and even delete duplicates, but they work on existing data after the fact.