Linear Regression in Microsoft Excel: Part I – How to Load the Excel Analysis Toolpak
Part I: Linear Regression in Microsoft Excel: How to Load the Excel Analysis Toolpak Add-In Most readers will be familiar with loading an Excel add-in. For those who don’t, or might be rusty, here’s a quick precis of what you need to do to perform easily linear regressions in Excel. The rest of you can […]
Is MONEY Bad? How to Use the MONEY Datatype in SQL Server
Jamal K, from Developing High-Performance SQL Server® Databases inquires… “A colleague at work said the MONEY datatype in SQL Server is bad and shouldn’t be used. Are there good reasons behind this or is it just hearsay?” Excellent question, Jamal. Before dealing with the question itself let’s consider some historical background. There’s nothing that can […]
Which Standard Deviation & Variance to use in Excel (and SQL!).
A look at STDEV, STDEVP, VAR and VARP- Amy M., from Developing SQL Queries for SQL Server, writes… “I know there are two functions for standard deviation and for variance in Transact-SQL, but I can never remember when to use which.” You are so right, Amy. It is hard to know when to use STDEV […]
How to Make a Histogram in Excel Using the Frequency Function
The Importance of Histograms and Descriptive Statistics The word “statistics” comes from the German word “stadt”. Stadt means “city” but in the 18th century each city was a state in its own right. And the people who ran those states needed to have the facts. What is the population? What is the food production? How […]