- #36
berkeman
Mentor
- 68,292
- 21,999
What was the sample size? (class size)HAYAO said:I was not always provided with distribution so I am not sure. But many of the professors explain that it is always not precisely Gaussian. Along with my personal investigation of the distribution of the scores, it looks something like this: A nice Gaussian distribution around the average score with around 30-40% FWHM, but we always have one student ALWAYS getting 90s (the genius), with another one or two students getting 70s to 80s (smart and enthusiastic guys). Then we have another very small Gaussian distribution around 5-10 (probably those who just don't want to study). Finally, one or two 0s (those two did not come to the test),
In one of the classes I referred to, the class size was about 250, and the instructor always posted the score distribution (and within 1 day -- he worked his TAs pretty hard), to his credit.
it was always Gaussian, so probably 10 students in the 90% plus range (top two students 96-97%), lots in the 70-90% range and so on. Average/Peak of the distribution was around 50-55%.