One of the usual assumptions for the GLM procedure is that the underlying errors are all uncorrelated with homogeneous variances. You can test this assumption in PROC GLM by using the HOVTEST option ...

Four large-sample methods are proposed for testing the equality of the variances of a p-variate normal population. Two of the methods are asymptotically distribution robust against departures from the ...

In the dynamic world of proteomics research, the purity and homogeneity of proteins are paramount. Impurities and heterogeneity can significantly impact the reliability and reproducibility of ...

We’ll send you a myFT Daily Digest email rounding up the latest Peter Drucker news every morning. The hardest thing to change in any organisation is the culture. Or as Peter Drucker famously put it: ...

This is a preview. Log in through your library . Abstract For square contingency tables with ordered categories, this paper decomposes the marginal homogeneity (MH) model into three models, i.e., (i) ...