Statistics Spotlight

2015

Statistics Roundtable: Reliability Upsizing

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

In many reliability evaluations, the units placed on life test are reduced-size versions of the actual product. This is often the result of practical limitations such as available test facilities....


Statistics Roundtable: Thinking of Linking

by Anderson-Cook, Christine

Results that come from statistical studies often hold the key to answering important business questions that can influence future choices made in a project....


Statistics Roundtable: Blocking Benefits

by Borror, Connie M.

When conducting even a seemingly simple experiment—such as one with a single factor with several levels—significant care and consideration should go into the design setup....


Statistics Roundtable: Are the Data the Data?

by Hare, Lynne B.

An argument broke out over a large set of production data. Can you imagine such a thing? At issue were some large financial implications. Who you gonna call? A statistician, of course. That’s how I got involved....


Statistics Roundtable: The Significance of Power

by Seaman, Christopher A.; Seaman, Julia E.; Allen, I. Elaine

The concept of “power” has long been overshadowed in statistical circles by its big brother, “significance.” Both parameters, chosen before a test, dictate the sample size and likelihood of making an erroneous conclusion when comparing two groups....


Statistics Roundtable: Guiding Beacon

by Hoerl, Roger W.; Snee, Ronald D.

Quality professionals are often faced with solving major organizational problems such as: “Customers are complaining about the quality of our product and returning it”; or “Our major process is producing an unacceptable amount of defective product.”...


Statistics Roundtable: A Different Take

by Borror, Connie M.

I still find p-values to be one of the more difficult topics to explain. One definition of a p-value is the probability of obtaining a value of the test statistic that's as large as or larger than the test statistic value obtained from your experiment....


Statistics Roundtable: Impactful Presentations

by Anderson-Cook, Christine M.

Recently, I found myself in an all-day meeting, presenting and listening to other presentations that summarized findings from many studies. Most of the talks had a similar mandate....


Statistics Roundtable: Making Data Manageable

by Seaman, Julia E.; Allen, I. Elaine

Often in testing groups or treatments, you need to know what has changed and how it has changed during the test or experiment. In comparing an outcome of two conditions, X and Y, you can look at the difference in the outcomes in several ways....


Statistics Roundtable: EVOP: An Underused Technology

by Hare, Lynne B.

EVOP? An acronym for a new zero defects automotive program called “every vehicle operates perfectly”? No. “Each variable obfuscates production”? No. Well, what is it?...



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