Chapter 7: Statistical Analyses 145
7307ENG.DOC CH 7, Statistical Analyses, English Julie Hewlett Revised: 07/29/98 12:07 PM Printed: 05/19/99
9:00 AM Page 145 of 22
Graph a scatter plot for L1 and L2, where L1={1,3,4,5,5,7,8,9} and
L2={1,4,2,3,4,6,7,9}, and use QuadReg to draw the quadratic
regression curve through the points.
1. Set Decimal Notation mode
to 2, if desired.
.#"""b
2. After entering the lists,
define Plot1 as a scatter plot
using L1 and L2, as shown to
the right.
-e
For more information on defining Stat
plots, see Chapter 6: Statistical Plots.
3. Turn off Y2, Y3 and Y4, if they
have been previously
defined and selected.
-l:
-}2 6
2¡3¡4b
4. Find the QuadReg curve, and
store the results to Y1.
-l:
-v!6
-}2 1b
Specifying ¨1 and ¨2 is optional since
they are the default
listnames
.
However, if you were using other list
names, you would have to enter them
before the
Yn
variable.
5. View the curve on the
Graph screen.
(6
³