## A quantile definition for skewness

Skewness is a measure of the asymmetry of a univariate distribution. I have previously shown…

By Rick Wicklin 0

Skewness is a measure of the asymmetry of a univariate distribution. I have previously shown…

By Rick Wicklin 0

An important problem in machine learning is the "classification problem." In this supervised learning problem,…

By Rick Wicklin 1

A SAS customer asked how to use SAS to conduct a Z test for the…

By Rick Wicklin 0

Suppose you roll six identical six-sided dice. Chance are that you will see at least…

By Rick Wicklin 0

In a previous article, I showed two ways to define a log-likelihood function in SAS.…

By Rick Wicklin 1

Maximum likelihood estimation (MLE) is a powerful statistical technique that uses optimization techniques to fit…

By Rick Wicklin 12

If you toss a coin 28 times, you would not be surprised to see three…

By Rick Wicklin 2

According to Hyndman and Fan ("Sample Quantiles in Statistical Packages," TAS, 1996), there are nine…

By Rick Wicklin 0

In last week's article about the Flint water crisis, I computed the 90th percentile of…

By Rick Wicklin 8

The April 2017 issue of Significance magazine features a cover story by Robert Langkjaer-Bain about…