Glossary

Spearman Rank Order correlation coefficient>

A nonparametric (distribution-free) rank statistic proposed by Spearman in 1904 as a measure of the strength of the associations between two variables. It is used in RiskyProject to estimate which task duration, risk, task start date, task cost, risk, etc. affects project duration, finish time, cost success rate the most. Complete results of calculation in form of chart are presented in Sensitivity View. See Lehmann, E.L. and D'Abrera, H.J.M. Nonparametrics: Statistical Methods Based on Ranks, rev. ed. Englewood Cliffs, NJ: Prentice-Hall, pp.292, 300, and 323, 1998.