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The values in the above tables can be used inside of
expressions the same way you use variables.
uLinear Regression
The regression formula for linear regression is:
y = A + Bx.
Example: Atmospheric Pressure vs. Temperature
Perform linear regression to de-
termine the regression formula
terms and correlation coefficient
for the data nearby. Next, use the
regression formula to estimate
atmospheric pressure at 18°C
and temperature at 1000 hPa. Fi-
nally, calculate the coefficient of
determination (
r
2
) and sample
covariance .
Temperature
Atmospheric
Pressure
10°C 1003 hPa
15°C 1005 hPa
20°C 1010 hPa
25°C 1011 hPa
30°C 1014 hPa
In the REG Mode:
1
(Lin)
A B 1
(Scl) =
(Stat clear)
10
P1003 S
1.
n=
REG
Each time you press S to register your input,
the number of data input up to that point is
indicated on the display (n value).
15 P 1005 S
20 P1010 S 25 P 1011 S
30 P 1014 S
Regression Coefficient A =
997.4
A X r r 1 =
Regression Coefficient B =
0.56
A X r r 2 =
Correlation Coefficient r =
0.982607368
A X r r 3 =
Atmospheric Pressure at 18°C =
1007.48
18 A X r r r 2 =
32


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