Texas Instruments TI-73VSC Guidebook - Page 146

140 Chapter 7: Statistical Analyses 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) Cursor changes to a small box. 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. & ax+b Y2, Y3, and Y4 may vary. Med-Med - v ! 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.