Statistics Features

Fred Schenkelberg's picture
Fred Schenkelberg
There is a type of error that occurs when conducting statistical testing: to work very hard to correctly answer the wrong question. This error occurs during the formation of the experiment. Despite...
Adam Conner-Simons's picture
Adam Conner-Simons
This story was originally published by MIT Computer Science & Artificial Intelligence Lab (CSAIL). Scatterplots. You may not know them by name, but if you spend more than 10 minutes online, you’...
Jay Arthur—The KnowWare Man's picture
Jay Arthur—The KnowWare Man
There are two ways to increase profits: increase sales or reduce costs. Although most data analysis seeks to find more ways to sell more stuff to more people, addressing preventable problems is an...
Matthew Bundy's picture
Matthew Bundy
Untitled Document Burning plastic cart carrying a fax machine, a laptop computer, and a three-ring binder. Click here for larger image. Credit: FCD/NIST Several centuries ago, scientists...
Douglas Allen's picture
Douglas Allen
Any number derived from real observation is made up of three components. The first of these is the intended signal, the “perfect” value from the object being observed. The second is error (or noise)...
Donald J. Wheeler's picture
Donald J. Wheeler
In part one we found the baseline portion of an XmR chart to be the best technique for identifying potential outliers among four tests with variable overall alpha levels. In this part we will look at...
Anthony D. Burns's picture
Anthony D. Burns
Augmented reality (AR) means adding objects, animations, or information, that don’t really exist, to the real world. The idea is that the real world is augmented (or overlaid) with computer-generated...
Donald J. Wheeler's picture
Donald J. Wheeler
The first statistical test was a test for outliers. The problem of what to do about outliers has been around from the beginnings of data analysis. Part one will compare four tests for outliers. Next...
Donald J. Wheeler's picture
Donald J. Wheeler
Every introductory class in statistics teaches how to obtain a global standard deviation statistic. While this descriptive statistic characterizes the dispersion of the data, it is not the correct...
Donald J. Wheeler's picture
Donald J. Wheeler
On Sept. 29, 2020, the recorded worldwide death toll from Covid-19 reached 1 million. Six days earlier the United States reached 200,000 Covid-related deaths. So how did the United States with only 4...
Eric Weisbrod's picture
Eric Weisbrod
The idea of digital transformation can be scary. The growth of technology is outpacing a comfortable pace of adoption for many manufacturers. But remaining content with the status quo often means...
Steve Wise's picture
Steve Wise
The importance of data analysis in manufacturing operations can’t be overstated. Over the years, manufacturers have used statistical process control (SPC) methods and tools to study historical data...
Dirk Dusharme @ Quality Digest's picture
Dirk Dusharme @ Quality Digest
In previous articles of this series, we discussed how to master quality at the tactical and strategic levels. If you are like most readers, you probably nodded your head through article two’s...
Jason Chester's picture
Jason Chester
Before we get into a case study about how enterprisewide SPC software would work on both the shop floor and the C-suite, let’s talk about a long-held bias about “blue-collar” workers: That because...
Ryan E. Day's picture
Ryan E. Day
In order to best illustrate how enterprisewide SPC software can help address shop-floor problems and then funnel the captured data to the corporate level where strategic issues can be analyzed, here...
Eric Weisbrod's picture
Eric Weisbrod
In recent months, we’ve learned that manufacturing during a global health crisis puts organizations under immense pressure to maintain operational efficiency while upholding product quality and...
Dirk Dusharme @ Quality Digest's picture
Dirk Dusharme @ Quality Digest
It’s been 40 years since “If Japan Can, Why Can’t We?”, W. Edwards Deming, and total quality management. More than 33 years have passed since the release of the first iteration of ISO 9001 (remember...
Taran March @ Quality Digest's picture
Taran March @ Quality Digest
In the intro to this series we noted that, too often, quality tools and the data we glean from them are used only to solve immediate, mostly shop-floor problems. These gold nuggets of opportunity...
Ryan E. Day's picture
Ryan E. Day
Those of you involved in matters of business strategy know: Strategy matters. Your strategies guide you to reach your objectives. Behind every successful business are purposeful strategies. Then...
Donald J. Wheeler's picture
Donald J. Wheeler
This article tracks the progression of Covid-19 over the past six months on a state-by-state basis and provides a framework for interpreting these curves by including curves for seven other countries...