Texas Instruments TI-73 EXPLORER, TI-73 140, !, v, Med-Med Med-Med -, 4 4

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
Y2, Y3, and Y4
may vary.