Casio FX-7400GII - SOFTWARE VERSION 2-00 User Manual page 150

Example Input the two sets of data shown below and plot the data on a scatter
diagram. Next, perform logarithmic regression on the data to display the
regression parameters, and then draw the corresponding regression
graph.
0.5, 1.2, 2.4, 4.0, 5.2 (
–2.1, 0.3, 1.5, 2.0, 2.4 (
STAT
(GRPH) (SET)
(CALC) ( )
(DRAW)
• You can perform trace on a regression graph. You cannot perform trace scroll.
• Input a positive integer for frequency data. Other types of values (decimals, etc.) cause an
error.
Selecting the Regression Type
After you graph paired-variable statistical data, you can use the function menu at the bottom of
the display to select from a variety of different types of regression.
ax b a bx
• { + }/{ + }/{Med}/{X^2}/{X^3}/{X^4}/{Log}/{
{linear regression (
regression}/{cubic regression}/{quartic regression}/{logarithmic regression}/{exponential
ae
regression (
{sinusoidal regression}/{logistic regression} calculation and graphing
• {2VAR}... {paired-variable statistical results}
Displaying Regression Calculation Results
Whenever you perform a regression calculation, the regression formula parameter (such as
b
and in the linear regression
these to obtain statistical calculation results.
Regression parameters are calculated as soon as you press a function key to select a
regression type, while a graph is on the display.
The following parameters are used by linear regression, logarithmic regression, exponential
regression, and power regression.
r
.............. correlation coefficient
r 2
............. coefficient of determination
MSe
......... mean square error
(Scat)
(Log)
ax b
+ form)}/{linear regression (
bx
form)}/{exponential regression (
y ax b
= + ) calculation results appear on the display. You can use
x
List)
y
List)
(GPH1)
ae bx ab x
^ }/{ ^ }/{Pwr}/{Sin}/{Lgst} ...
a bx
+ form)}/{Med-Med}/{quadratic
x
ab
form)}/{power regression}/
6-10
a