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 earth to the sun): Box plots are a standard tool for exploratory data analysis, but they have two important limitations. First, the boxplot…
read more
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: So the data set contains, for each of the eight planets in our solar system, the distance to the sun in astronomical units (AU),…
read more
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 the performance of the measurement device. An initial look suggested that the data were not normally distributed, and the time series suggested that several…
read more
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 over an example data set from the JASP Data Library that comes bundled with the program. In JASP, go to “Open” -> “Data Library”…
read more
In order to support the increasing number of Master Black Belts who are delivering quality control training with JASP we have just launched the JASP Quality Control Network. Our first four trainers are now listed on the website: For benefits and information on how to apply please see our previous blog post on the trainer network. We hope to grow…
read more
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 the insights from this groundbreaking work, and adopts JASP for their quality control analyses. The head of the data-analytics department at ZebraCows is unfamiliar with open-source software, and two surprises await them: Their first…
read more 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. In the near future, the JASP Services website will feature a directory of JASP QC trainers, including their expertise, their contact information, and the specific training programs they offer. Organized…
read more
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 you don’t need to buy an expensive software package like Minitab. There is free software available that meets my needs, and I suspect it will meet yours too.…
read more
Hello world! We are JASP Services BV, a company recently founded by eleven members of the 2025 JASP team. We help businesses move away from commercial stats software and towards JASP. Why We Founded JASP Services BV In operation since 2012, JASP is open-source statistical software with an intuitive graphical user interface. Entirely for free, with no strings attached, JASP…
read more