Assignments and tests statistics

Homeworks and tests statistics:

max possible
average
median
standard deviation
max grade received
min grade received
  PS1 100 69.75 76 24.58 98 18
  PS2 100 77.57 87.5 24.99 100 31
  PS3 100 85.23 85 13.32 100 60
 PS4 100+10 67.54+4.8 71+6 19.26+4.8 100+10 35+0
 PS5 100+25 83.31+13.9 85+15 19.7+8.4 100+25 39+5
PS6 100 84.31 93 22.14 100 35
PS7 100 87.69 95 18.33 100 50
PS8 100 91.85 100 11.98 100 67
Remark #1: the extra credit will be incorporated in the final homework grade at the end of the semester. For now it's being withheld from the calculation so that the grade distribution is less spread out.