Quiz 2: Average = 17.1 / 30, sigma = 6.3
grades histogram

Quiz 3: Average = 16.7 / 30, sigma = 9.0
grades histogram

Quiz 4: Average = 13.6 / 30, sigma = 7.9
grades histogram

Final/80: Average=31.4, sigma = 18.4
Final exam histogram (/80)

Overall course/100: Average =49 , sigma = 20
Overall course histogram (/100)