Sharp EL-9900 - Manual (Page 174)

164
Chapter 10: Statistics & Regression Calculations
1. Press S A E.
2. Enter the time into list 1 (L1).
3. Enter the temperature into list 2 (L2).
1. Press [ A E.
2. Press E to 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 [ G and 2 (2 Scattr+) to set the graph
type to scatter and point type to “ + ”.
3. Press Z A 9 (9 Stat) to plot the scatter diagram
for this data.
• Selecting A 9 in 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 # C S D 0 4 (04 Rg_x 2 ).
2. Press ( @ 1 , @ 2 , @
z A E A 1 ).
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.
Enter a data in a
list table
Plotting the data
Selecting the
graph type
Drawing a
regression
curve using
quadratic
regression