Texas Instruments TI-73 EXPLORER - Manual (Page 146)

140
Chapter 7: Statistical Analyses
7307ENG.DOC CH 7, Statistical Analyses, English Julie Hewlett Revised: 07/29/98 12:07 PM Printed: 05/19/99
9:00 AM Page 140 of 22
6. Move the cursor to the
beginning point of line.
" ! $ # (as
necessary)
b
7. Move the cursor to the end
point of line.
" ! $ # (as
necessary)
8. Draw the line.
b
9. Adjust line with cursor
keys, if necessary.
" ! $ #
b (when finished)
10. View the equation in the
Y= editor, if desired.
&
Med-Med Med-Med - v ! 4 4
Med-Med
(Median-Median) fits the model equation,
y=ax+b
, to
the data using the median-median line (resistant line)
technique, calculating the summary points
x1
,
y1
,
x2
,
y2
,
x3
, and
y3
.
Med-Med
displays values for
a
(slope) and
b
(y-intercept).
You can execute
Med-Med
from either the Graph screen, the
Home screen, or the Program editor.
From the Home screen or the Program editor,
Med-Med
accepts
four optional arguments. Enter up to two list names, XList and
YList; a frequency list, freq; and an equation variable, Yn. freq
is the frequency of occurrence for each corresponding data
point in XList and YList.
Cursor changes to a small box.
ax+b
Y
2
, Y
3
, and Y
4
may vary.