Discriminant correspondence analysis.

<p>95% confidence intervals for age groups shown on factors 1 and 2. Lambda () and tau () are the eigenvalues and the percentage of explained inertia (i.e., variance) for a given factor (, ; , ). Confidence ellipses represent the variability within the group. Ellipses showing no overlap represent different populations. Note that in correspondence analysis, the eigenvalues are never greater than 1.