HW1 1.1, 1.2, 1.3, 1.4. 20 pts--5 points per part.

HW2 1.5, 1.6, 1.7. 15 points--5 pts. per part.

HW3 1.8, 1.9, 1,10. 15 points, 5 pts per part. 1.8: (i) take off at most 2 pts; (ii): take off at most two points for errors. 1.9: 2 points taken off per wrong (or missing) subpart.

HW4 (Hugin=PR1) Exercise 1.11, 1.12, 1.13, 1.14, 1.15. 20 points in all. (1.11) 2 point if the student reports installation of Hugin (any version) on his or her PC; or, if the student announces his or her intention of using the version in the lab; or, if the student has done the other exercises, because this indicates that the student can use Hugin. (1.12) 3 points for a net file. One point off with the wrong DAG. Commendation for a screen dump. Additional commendation for two screen dumps or a screen dump showing two nets. Additional commendation for screen dumps indicating that evidence was entered. (1.13, 1.14: 5 points each) Check that three nets are submitted. Check the structure. If wrong, take out up to three points per exercise.

HW5 (Hugin=PR2) Exercises 2.1, 2.2, 2.3, 2.4, 2.5. Ex. 2.1: 5 points. Check structure. If wrong, take off 3 points. Ex.2.2: 3 points. Check structure. If wrong, take off two points. Ex. 2.3: 3 points. If wrong answer, take off two points. Ex. 2.4: 4 points. If wrong answer, take off two or three points. Ex. 2.5: 5 points. Two points off if no description given. Up to two points off if wrong DAG.

HW6. Exercise 1.15: 5 points. Incorrect structure, up to three points off.

HW7. Ex. 2.6, 6 points. 3 for part (i), 3 for part (ii). Check especially that the numbers computed in part(i) are used in part (ii). Ex. 2.7, 1 point. Ex.2,8: (i) 2 points The probability of infected milk is the same for each one of the days, with the probabilities in the book. In particular, P(Inf_{i+1}=yes | Inf_i = no) = 0.0002. Some students incorrectly used 0.0005 instead, and they noticed instability: P(Inf1) = 0.07, and P(Inf7) = 0.13. Take 1 point off for this. (ii) 3 points. Full credit for "logical" argument; full credit for algebraic proof. (iii) 3 points. Full credit for "logical" argument; full credit for algebraic proof.

HW8. Ex. 2.9, 3 points.

HW9. 10 points. Ex. 2.18. The number of parameters to be assessed is the same. There should be two figures, one with the network described in a way similar to figure 2.28 and one with the network similar to figure 2.29. 4 points per model, 2 points for the conclusion that the number of parameters to be assessed is the same.

PR3. Ex. 2.10. (i) 10 points (ii) 5 points (iii) 5 points

PR4. Ex. 2.22. 20 points in all. 4 points for each of the five parts. Go light on numerical errors!

PR5 Total: 20 points. Program turned in: 2 points. Program compiles: 2 more points. Use net file and evidence file provided by student. Runs correctly: 6 more points. Use asia.net and evidence as in presentation (marginal for TB, evidence A=yes and D=yes). Runs correctly: 6 points. [0.08775096498292188, 0.9122490350170781] Use asia.net and evidence (smoker=yes, positive X-ray = yes) and compute lung cancer. Should obtain 64.599143, 35.400857. Runs correctly: 3 points. Use studfarm and evidence John Sick and compute Gwenn [62.5, 37.5]: 1 point.

PR6 (extra credit) Extra credit: 20 points Program turned in: 2 points Program compiles: 2 points Use net file and evidence file provided by student. Runs correctly: 10 more points. If student did not provide asia with evidence in presentation as their default, use asia.net and evidence as in presentation (marginal for TB, evidence A=yes and D=yes). Runs correctly: 6 points. [0.08775096498292188, 0.9122490350170781] (approx.) Otherwise, use five-node network in book, with evidence A=y, B=n, compute P(C): 6 points. [.7,.3] (approx.)