Technical information, K when you have a problem, K error messages – Casio FX-820MS User Manual

Page 30

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background image

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.

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