Statistical Analyses
Here I list some of the statistical analyses or discussions that I've done at different places at different times:
- Warehouse problem -- I did an analysis for a company which makes Halloween costumes. They were interested in analyzing how many slots on a shipping cart to inspect to improve quality control.
- Aardvark analysis -- An analysis for somebody who asked a statistics question on aardvark.
Warehouse Problem
Here I did an analysis of the necessary sample size for a business problem that a company had. Please note that my first analysis is a relatively straightforward comment about using a standard statistical test to analyze the problem. The subsequent comment though is a more involved and sophisticated analysis which involved a probability calculation, and the deriving of a formula which computes the necessary sample size for a given level of accuracy. It is quite possible that this problem would fit into a larger body of statistical or probabilistic analysis, but I haven't investigated that.
Basically, he had a number of slots on a cart that with some probability p would be filled correctly, or with some probability 1 - p would be filled incorrectly. The cart had n slots, and the checker would check m of them. The question that I analyzed is: What is the probability that the whole cart is correct given that all the checked slots are correct?
As a part of this analysis I made a web calculator for the person.
My username on that forum is talkstatsdkf.
Click here for the expression which solves this problem.
Aardvark Analysis
Here is a link to an analysis that I did for somebody who posted a question on aardvark. The person was interested in fitting their data to the model specified by c1x3+ c2x and I made a few comments and suggestions.
For this analysis I also did two spreadsheets.