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yˆ
when x
i
is 16 = -13.38291067
16
(S-VAR) ( yˆ)
-13.38291067
xˆ
1
when y
i
is 20 = 47.14556728
20 (S-VAR) ( xˆ
1
)
47.14556728
xˆ
2
when y
i
is 20 = 175.5872105
20
(S-VAR) ( xˆ
2
)
175.5872105
Data Input Precautions
• inputs the same data twice.
• You can also input multiple entries of the same data using (;).
T
o input the data "20 and 30" five times, for example, press 20
30
(;) 5 .
• The above results can be obtained in any order, and not necessarily that
shown above.
• Precautions when editing data input for standard deviation also apply for
regression calculations.
• Do not use variables A through F, X, or Y to store data when performing
statistical calculations. These variables are used for statistical
calculation temporary memory
, so any data you may have assigned to
them may be replaced by other values during statistical calculations.
• Entering the REG Mode and selecting a regression type (Lin, Log, Exp,
Pwr, Inv, Quad) clear variables A through F, X, and Y. Changing from
one regression type to another inside the REG Mode also clears these
variables.
Equation Calculations (EQN)
The EQN Mode lets you solve equations up to three degrees and
simultaneous linear equations with up to three unknowns.
Use the
key to enter the EQN Mode when you want to solve an
equation.
(EQN)
Quadratic and Cubic Equations
Quadratic Equation: a x
2
+ b x + c = 0
Cubic Equation: a x
3
+ b x
2
+ c x + d = 0
37
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