boxplot whiskers - Business Performance Improvement (BPI)

November 21, 2019March 14, 2025 bizpi

Can’t afford statistics software? Try Excel’s Data Analysis ToolPak

When I teach Six Sigma classes, I teach students how to use Minitab statistical software. However, the software can be

box and whisker plot box plot boxplot boxplot whiskers interquartile plot IQR median graph median plot non-parametric nonparametric nonparametric graph outer range outliers

August 27, 2013November 11, 2019 bizpi

What do all the lines and boxes mean on a boxplot?

The Boxplot is one of simplest graphical tools to look at, and a tool I use very frequently when first

Lean Six Sigma Bursts

We share our takes and thoughts on a variety of topics related to process improvement (specifically Lean and Six Sigma methods), Bursts are rapid improvement activities, so this sounded like a good word to use for these short audio clips. We’ll try to keep them under 5 minutes each.

The following was a clip from a recent presentation, where I discuss how hypothesis testing can help you draw more statistically valid conclusions from data, and avoid misleading or incorrect conclusions.

I share two examples. The first was a data set from the Denver Sheriff's Department, where they graphed and analyzed intake use of force incidents, but their conclusions don't seem to match the graphic.

The 2nd example was data I pulled for a nonprofit I ran that showed the day of the week and time of day had no impact on click through rates on our monthly email newsletter.

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