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EPA's efforts is the development of a new slope factor that integrates the amphibole risk with the existing IRIS slope factor values and updated mortality information.
A comparison of the coefficient of efficiency and root mean square error of interill-only slope factor predictions using Eqns 25 and 33 for a range of datasets The standard deviation of the observed (normalised) slope data is also given, with the number of media tested within each dataset.
For example, if the variance for the slope factor is not significantly different from zero, then all the individuals in the particular group have the same mean slope.