Drawing A Regression Graph; Selecting The Regression Type - Casio FX-CG20 AU User Manual

k Drawing a Regression Graph
Use the following procedure to input paired-variable statistical data, perform a regression
calculation using the data, and then graph the results.
1. From the Main Menu, enter the Statistics mode.
2. Input the data into a list, and plot the scatter diagram.
3. Select the regression type, execute the calculation, and display the regression parameters.
4. Draw the regression graph.
Example
1 m Statistics
2 a.fwb.cwc.ewewf.cwe
-c.bwa.dwb.fwcwc.ew
1(GRAPH) 6(SET) c1(Scatter) J1(GRAPH1)
3 1(CALC) 6( g) 2(Log)
4 6(DRAW)
• You can perform trace on a regression graph. You cannot perform trace scroll.
k 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
{linear regression (
regression}/{cubic regression}/{quartic regression}/{logarithmic regression}/{exponential
regression (
{sinusoidal regression}/{logistic regression} calculation and graphing
• { 2-VAR }... {paired-variable statistical results}
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 (
2 3 4
} / { X } / { X } / { Log } / { ae
ax b
+ form)}/{linear regression (
bx
ae
form)}/{exponential regression (
x
List)
y
List)
bx x
} / { ab } / { Power } / { Sin } / { Logistic } ...
a bx
+ form)}/{Med-Med}/{quadratic
x
ab
form)}/{power regression}/
6-16