Blind Wine, Part 3Analyzing the results
Wed, 07/30/2014 - 16:57
In part 1 of “Blind Wine,” we introduced our blind wine-tasting experimental setup, which included some survey questions asked ahead of time of each participant. In part 2 we looked at the results of that survey. Here we’ll examine how well the… Blind Wine, Part 2Studying the survey
Tue, 07/29/2014 - 12:59
In part 1, we introduced our blind wine-tasting experimental setup, which included some survey questions asked ahead of time of each participant.
The four questions asked were: 1. On a scale of one to 10, how would you rate your knowledge of wine… Blind Wine, Part 1Conducting the experiment
Mon, 07/28/2014 - 09:24
Already relaxed on his first day in Napa, Brutus and his wife, Suzy, decide to visit their favorite winery just before lunch to taste its new Cabernet Sauvignon. The owner recognizes them as they walk in the door and seats them on the patio… Chaos at the Kentucky Derby?Bet on it!
Wed, 05/07/2014 - 09:25
If betting wasn’t allowed on horse racing, the Kentucky Derby, which this year saw California Chrome gallop to the finish line, would likely be a little-known event of interest just to a small group of horse racing enthusiasts. But like the Tour de… What I Learned From Treating Childbirth As Failure, Part TwoHint: It’s still not about diapering
Tue, 04/22/2014 - 10:42
A couple of years ago, I wrote a blog post titled "What I Learned From Treating Childbirth as Failure" that conveniently ended up getting published the day before my daughter was born. You should read it first, but to summarize, it demonstrates… Gauging Gage, Part 3How to sample parts
Thu, 03/13/2014 - 13:26
In part 1 and part 2 of this series, we looked at the numbers of parts, operators, and replicates used in a gauge repeatability and reproducibility (GR&R) study and how accurately we could estimate %Contribution based on the choice for each. In… Gauging Gage, Part 2Are three operators or two replicates enough?
Tue, 03/11/2014 - 17:19
In part one of this series, I looked at how adequate a sampling of 10 parts is for a gauge repeatability and reproducibility (GR&R) study and provided some advice based on the results.
Now I want to turn my attention to the other two factors… Gauging Gage, Part 1Are 10 parts enough?
Mon, 03/10/2014 - 16:52
You take 10 parts and have three operators measure each part two times. This standard approach to a gauge (or gage, if you prefer) repeatability and reproducibility (GR&R) experiment is so common, so accepted, so ubiquitous that few people ever… Variation Amplification: Even a 3-Year-Old Understands It Do you?
Wed, 08/28/2013 - 15:23
This weekend my 3-year-old son and I were playing with his marble run set, and he said to me, “The marbles start together, but they don’t finish together!”
It dawned on me that the phenomenon he was observing seems so obvious in the context of a… Forget Statistical AssumptionsJust check the requirements
Thu, 02/28/2013 - 11:39
One of the most poorly understood concepts in the use of statistics is the idea of assumptions. You’ve probably encountered many of these assumptions, such as “data normality is an assumption of the one-sample t-test.” But if you read that…
