Casio FX-350ES PLUS User Manual page 20

Results: Mean: 3
To calculate the linear regression and logarithmic regression
3 3
correlation coefficients for the following paired-variable data and
determine the regression formula for the strongest correlation: (
y
) = (20, 3150), (110, 7310), (200, 8800), (290, 9310). Specify Fix
3 (three decimal places) for results.
fx-82/85/350ES PLUS:
fx-95ES PLUS:
20
3150
Results: Linear Regression Correlation Coefficient: 0.923
Logarithmic Regression Correlation Coefficient: 0.998
Logarithmic Regression Formula:
Calculating Estimated Values
Based on the regression formula obtained by paired-variable statistical
calculation, the estimated value of
The corresponding
regression) also can be calculated for a value of
formula.
To determine the estimate value for
4 4
regression formula produced by logarithmic regression of the data
in . Specify Fix 3 for the result. (Perform the following operation
3
after completing the operations in
160
Result: 8106.898
Important: Regression coefficient, correlation coefficient, and estimated
value calculations can take considerable time when there are a large number
of data items.
(STAT)
1 2 3
1
(STAT)
(STAT)
Population Standard Deviation: 1.154700538
(SETUP)
(STAT)
110 200
7310
(STAT)
(STAT)
(STAT)
(STAT)
(STAT)
x
-value (two values,
(STAT)
(1-VAR)
4 5
2 3 2
(Var) ( )
(Var) ( )
x
(SETUP)
(SETUP)
(Fix)
(A + BX)
290
8800 9310
(Reg) (r)
(Type) (In X)
(Reg) (r)
(Reg) (A)
(Reg) (B)
y
= –3857.984 + 2357.532ln
y
can be calculated for a given
x
and
1
y
when
.)
3
(Reg) ( )
E-19
STAT STAT
(STAT) (OFF)
(STAT) (OFF)
STAT STAT
x
, in the case of quadratic
2
y
in the regression
x
= 160 in the
x
,
FIX FIX
x
x
-value.
C