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RE: st: Re: grading
Christopher W. Ryan
> Thanks. I must still not understand how -pctile- and
> -xtile- work. This code
> gave me sort of a U-shaped distribution of grades:
> highest-scoring students
> got fail, and so did the lowest-scoring. In the middle
> were honors, high pass,
> and pass.
> I tried this (adding in a "conditional" grade which I
> forgot to mention) :
> use "C:\quarantine\studentprogress.dta"
> collapse (sum) pointsearned, by(studentid)
> gsort -pointsearned
> gen str10 finalgrade="pass"
> replace finalgrade="honors" if _n<=(.15*_N)
> replace finalgrade="high pass" if _n>(.15*_N) & _n<=(.25*_N)
> replace finalgrade="conditional" if pointsearned<300 &
> replace finalgrade="fail" if pointsearned<200
> Clumsier, but it seemed to work.
This could give students different final grades
even though they got the same points earned,
because you could be splitting ties quite
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