Casio FX-820MS - Manual (Page 30)

E-28
Regression Coefficient C = – 6.71629667 i10 –3
A X r r 3 =
n when x i is 16 = –13.38291067
16
A X r r r 3 =
m
1 when y i is 20 = 47.14556728
20
A X r r r 1 =
m
2 when y i is 20 = 175.5872105
20
A X r r r 2 =
Data Input Precautions
•
S S
inputs the same data twice.
• You can also input multiple entries of the same data
using
A G
. To input the data “20 and 30” five times,
for example, press 20 P 30 A G 5 S .
• The above results can be obtained in any order, and not
necessarily that shown above.
• Precautions when editing data input for standard devia-
tion also apply for regression calculations.
Technical Information
k When you have a problem......
If calculation results are not what you expect or if an error
occurs, perform the following steps.
1. Press
A B 2
(Mode)
=
to initialize all modes and
settings.
2. Check the formula you are working with to confirm it is
correct.
3. Enter the correct mode and try performing the calcula-
tion again.
If the above steps do not correct the problem, press the
5
key. The calculator performs a self-check operation and
deletes all data stored in memory if any abnormality is
detected. Make sure you always keep written copies of all
important data.
k Error Messages
The calculator is locked up while an error message is on
the display. Press
t to clear the error, or press e or r
to display the calculation and correct the problem. See
“Error Locator” for details.