Statistics Spotlight

2008

Statistics Roundtable: Make Data Matter

by Snee, Ronald D.

Is data analysis an art or a science? Arguments exist for both sides, and many people simply come down in the middle: it’s both....


Statistics Roundtable: The Pros of Proactive Product Servicing

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

Just like athletes can experience an injury that takes them out of a game, systems can experience component failures that require downtime and repair....


Statistics Roundtable: More is Not Always Better

by Anderson-Cook, Christine M.

All other things being equal, if offered a choice between small or large sample sizes, the larger sample size is preferred. Or is it?...


Statistics Roundtable: Transforming Data

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

What separates a multivariate analysis from a univariate analysis in process control? As simple as this question might appear, the answer can sometimes be difficult to understand....


Statistics Roundtable: The Trusty Jackknife

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

Outliers are a continual source of problems when analyzing data. A few questionable data points can skew your distribution, make significant results seem insignificant and generally ruin your day....


Online Figures Statistics Roundtable: The Trusty Jackknife

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

Fixed-effects jackknife estimates eliminating single studies / online Figure 1 Random-effects jackknife estimates eliminating single studies / online Figure 2...


Statistics Roundtable: The Reality of Residual Analysis

by Hoerl, Roger W.

In the world of statistics textbooks, independent random samples of size 30 from a normal distribution are a dime a dozen—the norm rather than the exception....


Statistics Roundtable: In With the Right Crowd

by Snee, Ronald D.; Hoerl, Roger W.; Patterson, Angela N.

First, the good news: The importance of statistics related to the way the world does business has never been greater. Now, the bad news: The statistician and quality professional might become the proverbial middle man who gets cut out by these advances....


Statistics Roundtable: It Depends

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

A Shewhart chart is an excellent tool for detecting abrupt process changes. One of its additional properties is its ability to detect small process changes through the use of run rules....


Statistics Roundtable: More is Better

by Anderson-Cook, Christine M.

Central to the core goals of Six Sigma and other quality improvement initiatives is the idea that reducing variation in processes is a vital part of successfully enhancing customer satisfaction and bottom-line results....


Statistics Roundtable: Match Game

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

One useful method for evaluating new medical treatments, devices or services involves propensity score methods - matching members of different groups based on a range of characteristics and forming a probability score....


Statistics Roundtable: A Preference for Parity?

by Hare, Lynne B.

You rarely hear coaches encourage their teams to get out there and tie. So why do banks, restaurants, consumer goods companies and others try so hard to match their competition?...



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