where the uncertainty arises in part from the uniform and triajgular uncertainties assumed for F and B, respectively (see text), in addition to uncertainty is associated with the variate X associated with X defined[in Eq. (A5). Let the subscript p on a variate denote a variate value pertaining to a _ particular individual in the exposed population. Thus, X, =X|I{R =Rg,H = Hp} and (X,1f ) is the sum of a presumed large number of id independently distributed random variates. From the Lindeberg and Limit theorems, it follows that (X, |) is approximately normally dis with mean and variance given by (X,1B)=ct(R, 5,18) and oie = KRY + 73S) ~(518)'] respectively, in which YR = Z;( i) { ; Ry Mj = 0.035 is the CV for uncertainty in any individual's lifetime, time-weighted average intake based on the assumptions stated in the text and the valueslist¢d in Table 20. If population size N is sufficiently large to ensure tha] the differences between sample first and second moments with respeft to variability and their corresponding population moments are negligibje, it follows from the definition of variability expectation that uncertainty in] XiB is approximately normally distributed with mean and variance givenby (x1)) =>(x,I8) = ct(RXSIB) and p=l hey