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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.
