Instruction Manual

Data Entry Hints

# Press to enter the same data twice.

• Press H CiD to enter the same data several times.

For example, pressing 30 Q 40 [US CS 5 [Sl]

enters the data pair {30, 40} 5 times.

9 The same data entry hints noted lor Standard Deviation

mode (see earlier) also apply in Regression mode.

9 When carrying out statistical calculations, do not

store any data in variables A to F, X or Y. These

variables are used as temporary memory during

calculations and thus their contents could get

overwritten during a calculation.

Variables A to F, X and Y are cleared when you

select REG mode and choose a regression type

(Lin, Log, Exp, Pwr, Inv, Quad). They are also

cleared if you switch to another regression type.

Estimated value af 5c2=l 75.5872105 when yi = 20

Technical Data

■ Troubleshooting

............

If the result of a calculation is not what you expected,

or if an error occurs please carry out the following

steps.

1. Press the H H (Mode) B keys in that

order to reset all modes and settings.

2. Check that the formula or expression you

entered is correct.

3. Select the correct mode and try the calculation again.

If the problem persists, press [on| . The calculator will

perform a self-check and, if an abnormality is found,

clear all stored data. For this reason, you should

always have a copy of all important information kept

separate from the calculator.