Newsletter Archive - full copies of past Division newsletters

Statistics Body of Knowledge - our library content below focuses on the topics in this listing.


A Case Study in Sample Size

by Lenth, Russell

Statisticians are often asked questions related to sample size. However, they are often not well prepared to answer them. There are simple approximate sample-size formulas for such as two-sample t tests, and those can be pressed into service. But most studies are more complicated than that. In fact, often several effects come into play, and thus there are several aspects of the power/sample-size question. This article presents an example of a sample-size problem in a semiconductor experiment having a somewhat complex design. It is hoped that it helps to give some practical guidance in this confusing area.

  • Filetype: pdf
  • Publish date: 2014-03
  • Keywords:Sample Size, Semiconductor experiments, Split-lot designs
Open Access

Sampling for Process Audits

2010 Institute for Continual Quality Improvement Presentation

by Gurbachan Chandha

The presentation describes the author’s approach for applying sampling inspection to process audits...

  • Filetype: mp4
  • Publish date: 2011-03
  • Keywords:

Model Selection (Part I: Model Selection Criteria)

Mini Paper Appearing in Winter 2011 Newsletter

by Sam Gardner

Model selection is the process of choosing terms for a statistical model that adequately describes or accurately predicts the system under observation...

  • Filetype: pdf
  • Publish date: 2011-01
  • Keywords:model selection, R-squared, Mallow's Cp, AIC, BIC
Open Access

A Primer on Surveys

Mini-Paper appearing in the Winter 2000 Newsletter

by Heaphy, Maureen S.; Gruska, Gregory F.;

This article discusses considerations in question wording, answer choices, comparisons between surveys, and piloting (or validating) a questionnaire prior to its full-scale exe!..

  • Filetype: pdf
  • Publish date: 2000-01
  • Keywords:Communication, Random sampling, Rating scales, Representative sampling, Stratified sampling, Surveys
Open Access

Resampling: Transforming Statistics

Basic Tools Appearing in Winter 1994 Newsletter

by Peter Bruce

This article demonstrates the applications and advantages of resampling, a computationally rich but minimal assumption method for solving statistical problems requiring probabilistic analysis...

  • Filetype: pdf
  • Publish date: 1994-01
  • Keywords:Resampling, Hypothesis Testing, Normal distribution
Open Access

Measurement Systems Analysis - Revisited

Basic Tools Taken from the Summer 1993 Newsletter

by Gregory F. Gruska

This paper summarizes a collection of methods to study the stability and variability of measurement systems...

  • Filetype: pdf
  • Publish date: 1993-06
  • Keywords:Measurement system analysis, Metrology, Gage repeatability and reproducibility (Gage R&R, Gauge R&R), PDSA (plan-do-study-act) cycle, Individuals and moving range (X, mR) chart, Linear regression, sources of variation
Open Access

‘Stop Light’ Control - Revisited

Mini Paper Taken from the Summer 1991 Newsletter

by Heaphy, Maureen; Gruska, Gregory;

This paper presents ‘stop light’ control...

  • Filetype: pdf
  • Publish date: 1991-06
  • Keywords:Statistical process control, Control charts, Stop light control, Sampling, Double Sampling, Binomial distribution, Poisson distribution, False alarms

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