Hw4 grading details

Below are the statistics of hw4:

HW4	Without Extra Credits(139)
	Mean	Median	Highest
Overall	95.4	106	136
Under	77.4	76
Graduate	109	117

For this homework, as you can see, the full score is very big: 139 + 12(for extra credit)
Note that the weight I finally adopt for grading is a little different as shown in the solution.

P1(30): 3+4+5+6+3++ 3+ 6
P2(15): 3+3+3+3+3
P3(24): 3+3+3+3+6+6
P4(15): 3+3+3+3+3
P5(15): 6+3+3+3
P6(6): 3+3
P7(30): 3+6+3+3+3+3+4+5
P8(4).

Thus, the total is 30+15+24+15+15+6+30+4 = 139.

One common error:
P1, part C to compare p1, p2, and p3.
Lots of students provide p1<=p3 or p3<=p1. Actually, unless you know the exact CPT, both cases are possible. I took 2 pts off for this unless you provide solid justification.