## Fisher's transformation of the correlation coefficient

Pearson's correlation measures the linear association between two variables. Because the correlation is bounded between…

By Rick Wicklin 2

Pearson's correlation measures the linear association between two variables. Because the correlation is bounded between…

By Rick Wicklin 1

If you use SAS regression procedures, you are probably familiar with the "stars and bars"…

By Rick Wicklin 3

Correlation is a fundamental statistical concept that measures the linear association between two variables. There…

By Rick Wicklin 1

A previous article discussed the mathematical properties of the singular value decomposition (SVD) and showed…

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

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

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

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

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

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