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Verfügbare Sprachen
Verfügbare Sprachen
Linear regression
With linear regression, regression is performed in accordance with the following formula:
•
y = A + Bx
•
Example:
Calculate the regression formula coeffi cients and correlation coeffi cient for the
following data. Estimate the weight for people aged 24 and the age for people weighing 95 kg.
MODE MODE
SHIFT
30 , 76
Coeffi cient A = 31.4
Coeffi cient B = 1.5
Correlation coeffi cient (r) = 0.982682673
Weight at 24 y/o = 67.4 kg
Age for 95 kg = 42.4 y/o
Logarithmic, exponential, power and inverse regression
Formulas for these types of regression are:
•
Logarithmic regression:
•
Exponential regression:
•
Power regression:
•
Inverse regression:
Use the same key operations as those used for linear regression.
DE FR EN ES
EN
Age
Weight (kg)
30
76
32
79
34
84
36
85
38
88
(REG)
(Lin)
2
1
=
1
CLR
32 , 79
DT
SHIFT
SHIFT
y = A + B·ln x
y = Ae
B·x
y = Ax
B
y = A + (B/x)
58
4 , 84
36 , 85
DT
DT
▶ ▶
1
S-VAR
▶ ▶
2
S-VAR
SHIFT
24
SHIFT
S-VAR
95
SHIFT
S-VAR
38 , 88
DT
DT
=
=
▶ ▶
=
3
S-VAR
▶ ▶ ▶
=
2
▶ ▶ ▶
=
1
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