At the Albert Heijn, You Get About 2% More Potatoes Than What it Says on the Label - JASP Services BV A week ago I started a small quality control project where I measured twenty “1 kg” Albert Heijn (AH) potato bags in order to assess whether or not AH is systematically underfilling them, as some soci...

I recently bought 20 bags of potato that, according to the Albert Heijn supermarket, should each contain 1 kg. This turns out to be *false*.

www.jasp-services.com/at-the-alber...

Do the 1kg Albert Heijn Potato Bags Really Contain 1kg of Potatoes? - JASP Services BV A few days ago I announced a small quality control project where I would measure 20 bags of “1 kg” Albert Heijn (AH) potato bags to assess whether or not AH is systematically underfilling them, as som...

The suspense is building: do the measurements of 20 units indicate that the Albert Heijn underfills its 1 kg bags of potatoes? An interim post on the importance of articulating your predictions *before* seeing the results. :-)

www.jasp-services.com/do-the-1kg-a...

You Say Potato, I Say Quality Control: Weighting the 1kg Albert Heijn Potato Bags - JASP Services BV Recent social media posts have shocked Dutch society to its core, prompting public outrage and cries for tribunals. What had happened? Well, a few customers of the largest supermarket chain in the Net...

So we bought 20 kg of Albert Heijn potatoes — not to eat, but to test whether the “1 kg” bags really weigh 1 kg. Setup is ready and measurement about to start. Results are coming next week!

www.jasp-services.com/you-say-pota...

JASP for Quality Control, Example 4: The Raincloud Plot - JASP Services BV In our last post we discussed the boxplot of the distances to the sun for each of the eight planets in our solar system, as measured in astronomical units (AU; AU=1 is the average distance from the ea...

This week's blog post features "raincloud plots", a relatively recent development in data visualization.

Will the raincloud plot gradually replace the box plot? It just might!

Check out the raincloud plot for the planets in our solar system at

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JASP for Quality Control, Example 3: The Boxplot - JASP Services BV In this post we will take a closer look at the boxplot, a ubiquitous tool for data visualization (e.g., Tukey, 1977). The data set that we will use to highlight the key concepts is relatively small: S...

If you cannot sleep because you keep wondering why the two whiskers of a box plot can be of very different length (and why this is a Very Sensible Idea), then this blog post is for you! :-)
Boxplots 101, plus planets:

www.jasp-services.com/jasp-for-qua...

JASP for Quality Control, Example 2: Descriptives (aka "Always Plot Your Data") Continued - JASP Services BV In the previous post we started to analyze a dataset from the JASP Data Library. This dataset involved an instrument that was used to measure the same part 50 times. Such data allow us to determine th...

The plot thickens in our new blogpost...removing outliers reveals a surprise

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JASP for Quality Control, Example 1: Descriptives (aka "Always Plot Your Data") - JASP Services BV To showcase how JASP can be used for statistical quality control we initiate a series of blog posts in which JASP is used to execute key statistical tasks. In this series’ inaugural post, I will go ov...

"Always plot your data" -- an example of using descriptives *before* measuring capability of an instrument. We intend to have regular posts demonstrating how JASP can be useful for quality control and lean six sigma.

www.jasp-services.com/jasp-for-qua...

Why Companies Win by Investing in Open-Source Software - JASP Services BV In 2025, the IgNobel prize in Biology went to research on “whether cows painted with zebra-like striping can avoid being bitten by flies“. Suppose a fictitious company, ZebraCows, wishes to exploit th...

New blog post! Why companies win by investing in open-source software. With zebra-painted cows, of course.

www.jasp-services.com/why-companie...

Introducing JASP 0.95: Sandboxing, Plotbuilder, ESCI, Parametric Survival Analysis, and Much More - JASP - Free and User-Friendly Statistical Software We are proud to announce that JASP 0.95 has been released and is now available on our download page. JASP 0.95 presents a big step forwards, as you can see from the full release notes. Some of the hig...

Just out: JASP 0.95! With sandboxing, a new plot builder, ESCI, and more.

jasp-stats.org/2025/08/02/i...

Introducing the JASP Quality Control Network - JASP Services BV An increasing number of Master Black Belts are delivering quality control training with JASP. To support their efforts and enhance their visibility we are launching the JASP Quality Control Network. I...

In order to support the efforts of Master Black Belts delivering QC training with JASP we have now launched the JASP Quality Control Network. Check out the blogpost to read about the benefits and about how to join.

www.jasp-services.com/introducing-...

Cost Effective Six Sigma: Switching from Minitab to JASP - JASP Services BV NB. This contribution is also posted on the JASP website. Author: Martin Hayden, Master Black Belt at LearnSixSigma.co.uk discovers JASP. If you are practising Six Sigma today, the good news is that y...

"Cost Effective Six Sigma: Switching from Minitab to JASP" - a guest
post by Martin Hayden
www.jasp-services.com/cost-effecti...

JASP Services BV: Open-Source Support for Enterprise Success - JASP - Free and User-Friendly Statistical Software In the past few years, a number of companies have requested that we offer service to go with the JASP software. In order to fulfill such requests we recently founded JASP Services BV. Check out our br...

Our newly founded JASP Services BV supports companies who are switching to JASP. The BV provides open-source support including installation, onboarding, issue tracking, feature requests, bug fixes, and training: jasp-stats.org/2025/05/31/j...

Hello world! We are a new company that provides support for organizations and industries who use the JASP open-source stats program. Check out our website www.jasp-services.com and our first blog post www.jasp-services.com/first-post/
Know companies using commercial stats software? Share this info!🙂