It is frequently useful to summarize properties of a distribution using a few parameters, for example, using moments or other data functionals. In this work, compact and simple summary statistics are provided for the multicomponent exponential relaxation problem by the average relaxation rate, R , and the reciprocal of the average relaxation time, 1/ T . These are denoted herein as the rate-average relaxation rate, and the time-average relaxation rate, respectively. Rate-average relaxation rates weigh rapidly relaxing components more heavily, whereas time-average relaxation rates weigh slowly relaxing components more heavily. In general 1 RT 