BiNormal Expected Risk

When both log10 Exposure and log10 Response (e.g. cumulative Species Sensitivity) are Normally distributed, the Expected Risk (of a chemical) can be calculated with a simple Normal CDF lookup (Aldenberg et al., 2002, p. 72, equation 5.16). The next spreadsheet: BiNormal Expected Risk illustrates this. It also shows the scaling to the Response distribution, and calculates an extended Expected Risk Table 5.3 (Aldenberg et al., 2002, p. 73).