Consider Example 3.12 with d0, the prior probability of having the disease, a function of ones age

a, and quantity of cigarettes smoked daily,

c. Assume that d0 has been estimated to be given approximately by

Construct a graph with two plots: the top plot showing Pr(D | +) for 0 ≤ a ≤ 80 and c = 10, while the bottom plot is Pr(D | +) for a = 45 and 0 ≤ c ≤ 40.

do (a, c) = (c+1) tanh(23)+1 100