CORRELATION AND REGRESSION PROGRAM
By Daniel Wedge
For Casio fx-9700 calculators
*** MORE GAMES AND PROGRAMS FOR CASIO CALCULATORS AT ***
******** http://www.student.uwa.edu.au/~wedgey *********
This program will determine the correlation coefficient, the
covariance and the line of best fit, given:
sum of x
sum of x^2
sum of y
sum of y^2
sum of xy
number of stats
You will need to put your calculator into regression mode
before entering this program (shift+menu, F4)
SYMBOLS USED
$x sum of x
$x2 sum of x^2
$y sum of y
$y2 sum of y^2
$xy sum of xy
^2 squared (the button)
@ display
=> and/then
-> assign key
!= not equal to
<= less than or equal to
>= greater than or equal to
* multiply
/ divide
size: 263 bytes
'CORR+REG
0->A~Z
"$x"? -> A
"$x2"? -> B
"$y"? -> C
"$y2"? -> D
"$xy"? -> E
Lbl 0
"n"? -> F
F!=Int F => Goto 0
F<=0 => Goto 0
A/F -> X
C/F -> Y
"COVARIANCE=Sxy:"
E/F-XY -> S@
"VAR X:"
B/F-X^2 -> U@
"ST DEV X:"
sqrt U -> U@ sqrt means square root
"VAR Y:"
D/F-Y^2 -> V@
"ST DEV Y:"
root V -> V@
"CORR COEFF=r:"
S/(UV)@
"EQN OF LINE=A+BX:"
"A=":Y-Z(S/U^2)@
"B=":S/U^2@
'FINISHED"