175
STATISTICS/ REGRESSION CALCULATIONS
for US
1. Press
A
®
to display the list input screen.
First, we will enter the time in list L1 and the water
temperature in list L2.
2. Complete time entry by pressing 2
®
3
®
4
®
…12.5
®
>.
3. Complete water temperature entry by pressing
38.4
®
46.4
®
54.4
®
…100
®
.
Next, we will set the statistical graph settings and plotting location.
Here, PLOT1 is displayed using a scatter diagram.
4. Specify PLOT1 by pressing
Ï
STATPLOT
A®
.
5. Press
®
to turn on PLOT.
6. Specify 2-variable “XY” by pressing ≥>
®
.
“ListY” (Y axis) is displayed in the list and L2 is
automatically displayed.
Next, we will specify “+” as the graph dot type used.
7. Press
Ï
STATPLOT
G2
to specify graph type,
scatter diagram and dot type: “+”.
The GRAPH image screen dot will change to “+”,
indicating that “+” has been specified as the dot type.
• X’, Y’ will be valid after regression calculations, excluding 2nd, 3rd and 4th degree
polynomial regressions, logistic regression and sin regression, have been done.
<Example10>
The following relationship was found when heating a beaker filled with water.
Find the regression equation using the data and estimate the water temperature before
heating.
Water
tempera-
ture (°C)
Time (sec) 234567891010.5 11 11.5 12 12.5
38.4 46.4 54.4 62.5 69.6 76.1 82.4 88.6 93.4 94.9 96.5 98.2 99.1 100
EL-9650-(07)En (157-177) 8/1/00, 9:06 AM175
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