Results:
(110, 7310), (200, 8800), (290, 9310). Specify Fix 3 (three decimal places)
for results.
(SETUP)
(STAT)
(OFF)
(SETUP)
(Fix)
(STAT)
(A+BX)
20
110
200
290
3150
7310
8800
9310
(STAT)
(Reg)
(
r
)
0.923
(STAT)
(Type)
(ln X)
(STAT)
(Reg)
(
r
)
0.998
(STAT)
(Reg)
(A)
-3857.984
(STAT)
(Reg)
(B)
2357.532
Linear Regression Correlation Coefficient: 0.923
Logarithmic Regression Correlation Coefficient: 0.998
Logarithmic Regression Formula:
y
= -3857.984 + 2357.532ln
x
Calculating Estimated Values
Based on the regression formula obtained by paired-variable statistical
calculation, the estimated value of
y
can be calculated for a given
x
-value.
The corresponding
x
-value (two values,
x
1
and
x
2
, in the case of quadratic
regression) also can be calculated for a value of
y
in the regression
formula.
Example 4:
To determine the estimate value for
x
when
y
= -130 in the
regression formula produced by logarithmic regression of the data in
Example 3. Specify Fix 3 for the result. (Perform the following operation
after completing the operations in Example 3.)
130
(STAT)
(Reg)
(
x
ˆ)
4.861
Important!
• Regression coefficient, correlation coefficient, and estimated value calculations can
take considerable time when there are a large number of data items.
Performing Normal Distribution Calculations
While single-variable statistical calculation is selected, you can perform
normal distribution calculation using the functions shown below from the
54
Summary of Contents for fx-570ES PLUS
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