STATISTICS of TWO VARIABLES
(Using the Graphing Calculator)
STEP 1:
1.
2.
3.
STEP 2:
1.
2.
3.
4.
5.
4.
STEP 3:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
STEP 4:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
CLEAR ALL LISTS
Select 2nd MEM
Select 4:ClrAllLists ENTER (screen should say DONE)
Clear screen by selecting CLEAR
ENTERING DATA
Select STAT
Select 1:Edit (screen should show lists L1, L2, etc.)
Enter data in L1 (independent variable) by keying in number and
selecting ENTER after each value.
Cursor to L2.
Enter data in L2 (dependent variable).
Select 2nd QUIT after the last value has been entered.
SCATTER PLOT
Select y=
Clear any equations stored in the calculator using CLEAR
Select 2nd QUIT
Select 2nd StatPlot
Select Plot 1
Select:
ON, Scatter Plot ICON, X List: L1, Y List: L2
nd
Select 2 QUIT
Select ZOOM
Select 9:ZoomStat (scatter plot will appear)
Select 2nd QUIT
CORRELATION COEFFICIENT
Select 2nd CATALOG
Scroll to diagnostic ON
Select ENTER (screen displays diagnostic ON)
Select ENTER (screen displays DONE)
CLEAR screen
Select STAT
Cursor to CALC
Select 4:LinReg(ax+b)
Select ENTER (screen will display data)
The last value, r =, is the correlation coefficient.
STEP 5:
1.
2.
3.
4.
5.
STEP 6:
1.
2.
3.
4.
5.
6.
STEP 7:
1.
2.
3.
4.
5.
CALCULATING LINE OF BEST FIT (y=ax + b)
Select STAT
Cursor to CALC
Select 4:LinReg(ax+b)
Select ENTER (screen will display data)
The values of a and b are listed on the screen.
SCATTER PLOT with LINE/CURVE OF BEST FIT
Select y=
Enter the equation: \y1=
(use X,T,,n key for a variable, ^ for an exponent)
Select 2nd QUIT to exit
Select ZOOM
Select 9:ZoomStat (scatter plot with line of best fit will appear)
Select 2nd QUIT
CALCULATING THE CURVE OF BEST FIT
Select STAT
Cursor to CALC
Select 0:ExpReg or A:PwrReg or 5:QuadReg or 6:CubicReg
Select ENTER (screen will display data)
The values of a and b are listed on the screen.