# Statistics Roundtable

## 2000

### Metrics for uncertainty.

by Hunter, J. Stuart

A look at probability, evidence and a seldom used additive metric

Note that a bad item provides negative evidence for H. Let's agree 72 I Q U A L I T Y P R O G R E S S I D E C E M B E R 2 0 0 0 Metrics for Uncertainty A look at probability, evidence and a seldom used additive metric by J. Stuart Hunter Statistics Round...

### Six Sigma improves both statistical training and processes.

by Snee, Ronald D.

I refer to the definition of statistical thinking published in Glossary and Tables of Statistical Quality Control: Statistical thinking is a philosophy of learning and action based on the following fundamental principles: All work occurs in a system of i...

### You don't have to be awful to be a statistician, but it helps.

by Hare, Lynne B.

Using experimental design to perfect products and processes

One strategy might be to examine combinations of ingredients in a two- level factorial design as seen in Table 1. A statistical thinking practitioner, however, would look at the entire process and wonder if a screening design of the various ingredients, ...

### Product life data analysis: a case study.

by Doganaksoy Necip; Hahn Gerald J. ; Meeker, William Q.

Device H Failure Data TABLE 1 Failed devices* K cycles 6 ( 1) 12 ( 1) 26 ( 1) 28 ( 1) 30 ( 1) 50 ( 1) 64 ( 1) Unfailed devices* K cycles K cycles 2 ( 3) 34 ( 2) 4 ( 3) 36 ( 2) 6 ( 2) 38 ( 2) 8 ( 3) 40 ( 2) 10 ( 1) 42 ( 1) 12 ( 9) 44 ( 6) 14 ( 5) 46 ( 2) ...

### Interpretive features of a T2 chart in multivariate SPC.

by Mason, Robert L.; Young, John C.

The ball is rolling down the hill and gains momentum as it moves

84 I Q U A L I T Y P R O G R E S S I A P R I L 2 0 0 0 Interpretive Features of a T2 Chart In Multivariate SPC The ball is rolling down the hill and gains momentum as it moves by Robert L. Mason and John C. Young Statistics Roundtable Typical T2 Chart of...

### Randomization is the key to experimental design structure.

by Gunst, Richard F.

Figure 1 displays the average cutoff times ( in hundredths of a second) for each combination of speed and lawn- 72 I Q U A L I T Y P R O G R E S S I F E B R U A R Y 2 0 0 0 Randomization Is the Key To Experimental Design Structure by Richard F. Gunst Sta...