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Blackline Masters/STATISTICS USING THE SHARP EL-9600 79
Copyright © 1998, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
Steps for calculating the best-fitting line
1. Turn the calculator on and press STAT to enter the statistics menu.
Access the data entry screen by touching A EDIT and pressing ENTER .
Delete old data and enter the following data set:
X Y
25 32
28 33
31 27
40 38
29 30
Check the data you have entered and correct any errors you may find.
2. To find the best-fitting line (regression line) for the data, press STAT ,
touch D REG, double touch 02 Rg_ax+b, and press ENTER .
3. To overlay the regression line and the scatter diagram for the data, you must
first set up the scatter diagram by pressing 2ndF STAT PLOT , touching
A PLOT1, pressing ENTER ENTER ▼ ENTER ▼ 2ndF L1
ENTER 2ndF L2 ENTER 2ndF STAT PLOT , touching G S.D.,and
touching 3 Scattr.
4. Display the scatter diagram for the data by pressing WINDOW and setting
Xmin = 20, Xmax = 45, Xscl = 5, Ymin = 25, Ymax = 40, and Yscl = 5. Press
GRAPH to view the scatter diagram.
5. To view the overlay of the regression line and the scatter diagram, press
Y= CL VARS , touch H STAT, press ENTER , touch B REGEQN, double
touch 1 RegEqn, and press GRAPH .
LINEAR REGRESSIONS
8.1
NAME _____________________________________________________ CLASS __________ DATE __________
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