Correlation Matrix:
A Correlation matrix describes correlation among M variables. It is a square symmetrical MxM matrix with the (ij)th element equal to the correlation coefficient r_ij between the (i)th and the (j)th variable. The diagonal elements (correlations of variables with themselves) are always equal to 1.00.
Many methods of multivariate statistical analysis rely on a correlation matrix as the initial data, e.g. principal component analysis , factor analysis , path analysis.
Planning on taking an introductory statistics course, but not sure if you need to start at the beginning? Review the course description for each of our introductory statistics courses and estimate which best matches your level, then take the self test for that course. If you get all or almost all the questions correct, move on and take the next test.
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