## Use a bar chart to visualize pairwise correlations

Visualizing the correlations between variables often provides insight into the relationships between variables. I've previously…

By Rick Wicklin 0

Visualizing the correlations between variables often provides insight into the relationships between variables. I've previously…

By Rick Wicklin 0

When someone refers to the correlation between two variables, they are probably referring to the…

By Rick Wicklin 3

Recently, I was asked whether SAS can perform a principal component analysis (PCA) that is…

By Rick Wicklin 0

Last week I blogged about the broken-stick problem in probability, which reminded me that the…

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 2

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…