Cross-platform program for likelihood-based statistical comparisons of mortality profiles on a triangular graph

► Most faunal analyses use mortality profiles to investigate age-at-death patterns. ► A triangular graph, or ternary diagram, remains a popular method for doing this. ► Comparisons made visually, but differences hard to interpret without statistics. ► We offer a likelihood-based method for statistical comparisons on a triangular graph. ► A cross-platform computer program that implements our approach is available.