Box’s test is used to determine whether two or more covariance matrices are equal.
Topics
References
IBM (2017) Box’s M test. IBM SPSS Statistics Algorithms
https://www.sussex.ac.uk/its/pdfs/SPSS_Statistics_Algorithms_22.pdf
Johnson, R. A., Wichern, D. W. (2007) Applied multivariate statistical analysis. 6th Ed. Pearson
https://www.webpages.uidaho.edu/~stevel/519/Applied%20Multivariate%20Statistical%20Analysis%20by%20Johnson%20and%20Wichern.pdf
Rencher, A.C., Christensen, W. F. (2012) Methods of multivariate analysis (3nd Ed). Wiley