I write pDgT for P{DT}. Here is how Example 2.3.9 can be implemented. sensitivity =.95 specificity =0.95 p_D =.1 p_T = sensitivity p_D +(1 code p_D___ T= sensitivity = p_D / p_ T p_D_- T Ex 21. 1. Make a plot of P{DT} in which you vary the sensitivity from 0.9 to 0.99. Explain what you see. 2. Make a plot of P{DT} in which you vary the specificity from 0.9 to 0.99. 3. Make a plot of P{DT} in which you vary P{D} from 0.01 to 0.5. Explain what you see