Texas Instruments TI-83 PLUS - Manual (Page 428)

TI-83 Plus Inferential Statistics and Distributions 425
normalpdf(
normalpdf( computes the probability density function (
pdf
) for the normal
distribution at a specified x value. The defaults are mean m =0 and
standard deviation s =1. To plot the normal distribution, paste normalpdf(
to the Y= editor. The probability density function (pdf) is:
0 ,
2
1
) ( 2
2
2
) (
> =
−
−
σ
σ π
σ
µ
x
e x f
normalpdf( x [ , m , s ] )
Note: For this example,
Xmin = 28
Xmax = 42
Ymin = 0
Ymax = .25
Tip: For plotting the normal distribution, you can set window variables
Xmin
and
Xmax so that the mean m falls between them, and then select 0:ZoomFit from the
ZOOM menu.