Re: Why does the TI-85 do...
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Re: Why does the TI-85 do...
I had a computer crash as I was writing you a note.
I was about to add that you should try Texas Instruments
home page they have execellent programs in assembly for
statistics.
http://www.ti.com/calc/docs/86assembly.htm
They work on the TI-86 and they have very good
documentation.
As for fnInt(e^(-0.5x^2),x,-e99,t) try:
fnInt(e^(-0.5x^2),x,-10,t)/sqrt(2*PI)
or better yet try:
.5+fnInt(e^(-0.5x^2),x,0,t)/sqrt(2*PI)
Both should give good results for the cummulative normal.
(The second is faster.)
Good Luck
Gary Wardall
UWGB Mathematics
GreenBay, WI 54301
wardallg@uwgb.edu
http://www.ti.com/calc/docs/86assembly.htm
>Hi everybody, does some of you know how to integrate
>
>e^-(0.5x^2) from -infinity to t by hand or by calculator?
>
>When I type in fnInt(e^(-0.5x^2),x,-e99,t) I get 0 for every value of t.
>Why?
>My calculator is in floating point mode, tolerance set to e-5 and delta to
>0.01. My ROM version is 8.0 however the problem occurs on ROM 10.0 machines
>too.
>
>
>Does anybody know of a program for the calculator or my PC, which you could
>use to check if some material is e.g. normal distributed? A program (or
>add-in to Excel) which can save all the tiresome drawing by hand on
>distribution paper?
>
>
>Kind regards Kasper Vibe Grevsen, Denmark