Sharp EL-9900 operation manual Press #CSD0404 Rgx2

Chapter 10: Statistics & Regression Calculations

Enter a data in a list table

Plotting the data

Selecting the graph type

Drawing a regression curve using quadratic regression

1.Press SAE.

2.Enter the time into list 1 (L1).

3.Enter the temperature into list 2 (L2).

1.Press [AE.

2.Press Eto turn on the plotting.

3.Press }and 'to select XY of DATA menu and press

E.

Freq will change to ListY and set L2 to ListY.

1.Press }to move the cursor to GRAPH.

2.Press [Gand 2(2 Scattr+) to set the graph type to scatter and point type to “+”.

3.Press ZA9(9 Stat) to plot the scatter diagram for this data.

•Selecting A9in the ZOOM mode allows for quick graphing in an optimum range since window setting values of the graph plotting screen are automatically set using the list data.

1.Press #CSD04(04 Rg_x2).

2.Press (@1,@2,@ zAEA1).

If you enter Y1 as the last variable, the obtained formula will automatically be set to the formula Y1.

3.Press E.

The regression formula and parameters will be displayed on the screen.

4.Press G.

The calculator will draw the scatter diagram using the deter- mined parameter values.

5.If there is a large difference between the regression curve and plotted dots, change the regression curve and repeat the above procedures.

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