i took one year of statistics in college nearly five years ago, so i might be a little rusty at this... but i think you can roughly approximate your ranking based on the following assumptions and equations

(1) assume grades fall on a normal distribution

(2) z = (x - u) / s; where x = your GPA, u = the mean GPA, and s = standard deviation

(3)ESTIMATE YOUR STANDARD DEVIATION!! s = (L - S)/4; where L = highest possible GPA, S = lowest possible GPA (note: since all Fs are unheard of, I simply put the lowest possible GPA as a D average, which makes sense, at least at my school where all As is about as rare as all Ds); instead of 4, you can use 6 if you are more confident about your L and S estimates...

(4) calculate your z, and reference the following table http://www.sruweb.com/~walsh/witte_z_table_1.jpg; your z number should be a three digit number (negative or positive) with a decimal after the first number

If your z number is positive, you are ahead of the median!! look at the second column; it will tell you what percentage of students are ahead of you!!

If your z number is negative, you are behind the median!!

look at the second column, it will tell you what percentage of students are behind you!!

I hope this helps.. this is a rough, rough, rough approximation.. hahahaha we've made some huge assumptions here (like everything falls on a normal distribution).. many teachers have told me though that if you have a big enough sample size (i.e. class size), usually it works out that way... besides, most schools enforce a distribution, but it isn't always normal.. close enough, though

if there is some other more sophisticated way, i'd love to know..

math nerds of the world, unite!

(1) assume grades fall on a normal distribution

(2) z = (x - u) / s; where x = your GPA, u = the mean GPA, and s = standard deviation

(3)ESTIMATE YOUR STANDARD DEVIATION!! s = (L - S)/4; where L = highest possible GPA, S = lowest possible GPA (note: since all Fs are unheard of, I simply put the lowest possible GPA as a D average, which makes sense, at least at my school where all As is about as rare as all Ds); instead of 4, you can use 6 if you are more confident about your L and S estimates...

(4) calculate your z, and reference the following table http://www.sruweb.com/~walsh/witte_z_table_1.jpg; your z number should be a three digit number (negative or positive) with a decimal after the first number

If your z number is positive, you are ahead of the median!! look at the second column; it will tell you what percentage of students are ahead of you!!

If your z number is negative, you are behind the median!!

look at the second column, it will tell you what percentage of students are behind you!!

I hope this helps.. this is a rough, rough, rough approximation.. hahahaha we've made some huge assumptions here (like everything falls on a normal distribution).. many teachers have told me though that if you have a big enough sample size (i.e. class size), usually it works out that way... besides, most schools enforce a distribution, but it isn't always normal.. close enough, though

if there is some other more sophisticated way, i'd love to know..

math nerds of the world, unite!