HP 10s+ - Linear Regression

25
• The statistics values calculated can be stored in
variables and used in expressions.
Linear Regression
• The formula for linear regression is =A+B
• Example: The relationship between atmospheric
pressure and air temperature is given in the
following table:
The following explains how to calculate the
coefficients of the regression formula and how the
formula can then be used to determine air
temperature at a particular pressure (1000hPa) and
the air pressure at a particular temperature (-5°C). In
the process, we also determine the coefficient of
determination (
2
) and the sample covariance.
To display this result Press these keys
3
2
4
Regression coefficient C
1
2
    

   
    

   

    
     

    
Air
Temperature
Atmospheric
Pressure
10°C 1003 hPa
15°C 1005 hPa
20°C 1010 hPa
25°C 1011 hPa
30°C 1014 hPa
Σx
Σx
y
Σx
x
)
x
)
y
)
y
x
r