normal probability plots


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normal probability plots



A query about normal probability (aka normal quantile) plots was posted to
CALC-TI a couple of days ago.  I am sending this to GRAPH-TI as well, since
these may be useful for teachers.  Apologies to those who read both lists.

Attached to this message are programs to make normal probability plots for
the TI-86 and TI-85.  These programs need no support software (e.g., the 86
advanced stats package).  To use them, have your data in a list (say,
"mydata"), then run the NormPlot program.  Type the name of your list in
response to the "Data List" prompt, and after a bit of computation, a
normal probability plot will be drawn on the screen.  Your original data
list is unchanged, and if you want to refer to the normal quantiles, they
are stored in a list called "nscores" (in the appropriate order to match up
with your original data).

For information on interpreting these plots, consult a statistics textbook.

NormPlot.86P

NormPlot.85p

Darryl K. Nester                E-mail: mailto:nesterd@bluffton.edu
Assoc. Prof. of Mathematics        WWW: http://www.bluffton.edu/~nesterd
Bluffton College                 Phone: 419-358-3483
Bluffton, OH  45817-1704           Fax: 419-358-3232

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