Inferential Statistics and Distributions 13-35
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 35 of 36
To display the DISTR DRAW menu, press y [DISTR] ~.
DISTR DRAW instructions draw various types of density
functions, shade the area specified by lowerbound and
upperbound, and display the computed area value.
To clear the drawings, select 1:ClrDraw from the DRAW
menu (Chapter 8).
Note: Before you execute a DISTR DRAW instruction, you must set
the window variables so that the desired distribution fits the screen.
DISTR DRAW
1:ShadeNorm( Shades normal distribution.
2:Shade_t( Shades Student-t distribution.
3:Shadec2(Shades c2 distribution.
4:ShadeÛ(Shades Û distribution.
Note: L1å99 and 1å99 specify infinity. If you want to view the area left
of upperbound, for example, specify lowerbound
=
L1å99.
ShadeNorm( draws the normal density function specified
by mean
m
and standard deviation
s
and shades the area
between lowerbound and upperbound. The defaults are
m
=0 and
s
=1.
ShadeNorm(lowerbound,upperbound[,m,s])
Note: For this example,
Xmin = 55
Xmax = 72
Ymin = L.05
Ymax = .2
Distribution Shading
DISTR DRAW
Menu
ShadeNorm(