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

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

(xList)

 

–2.1, 0.3, 1.5, 2.0, 2.4

(yList)

1m Statistics

2a.fwb.cwc.ewewf.cwe -c.bwa.dwb.fwcwc.ew 1(GRAPH)6(SET)c1(Scatter)J1(GRAPH1)

31(CALC)6(g)2(Log)

46(DRAW)

• You can perform trace on a regression graph. You cannot perform trace scroll.

kSelecting 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}/{X2}/{X3}/{X4}/{Log}/{aebx}/{abx}/{Power}/{Sin}/{Logistic} ...

{linear regression (ax+b form)}/{linear regression (a+bx form)}/{Med-Med}/{quadratic regression}/{cubic regression}/{quartic regression}/{logarithmic regression}/{exponential regression (aebx form)}/{exponential regression (abx form)}/{power regression}/ {sinusoidal regression}/{logistic regression} calculation and graphing

{2-VAR}... {paired-variable statistical results}

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