The grade statistics are:
83 students handed in assignment 3.
assignment 3 as a whole: mean 79.3398
stdev 21.5234
Per-problem statistis:
Num 1: mean 37.373494
stdev 9.544709
Num 2: mean 27.409639
stdev 10.672604
Num 3: mean 15.325301
stdev 6.284631
Per-problem statistics, omitting zero grades:
Num 1: mean 39.769231
stdev 1.290230
Num 2: mean 28.437500
stdev 9.431124
Num 3: mean 16.736842
stdev 4.416978
and the grade distribution is

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