1 Proportion Test - Business Performance Improvement (BPI)

statistical significance statistical tests statistics

January 11, 2018November 11, 2019 bizpi

Calculating Confidence Intervals for Proportions in Minitab

A common question I get asked is: how accurate are my defect rate predictions? If you are inspecting a sample

Lean Six Sigma Bursts

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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E118: Real-life Examples of Hypothesis Testing

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