Casio FX-820MS Manuale Utente

E-26

• 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:

 = A + B

.

• 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 esti-
mate atmospheric pressure at
18

°C and temperature at 1000

hPa. Finally, calculate the coeffi-
cient of determination (

2

) and

sample covariance

                              

.

In the REG Mode:

1

(Lin)

A

 

B

 

1

 (Scl) 

=

 (Stat clear)

10 

P

1003 

S

Each time you press 

S

 to register your input,

the number of data input up to that point is

indicated on the display (

 value).

15 

P

 1005 

S

20 

P

1010 

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 

 = 0.982607368

A X r r 3 =

Atmospheric Pressure at 18

°C = 1007.48

18 

A X r r r 2 =

Temperature at 1000 hPa = 4.642857143

1000 

A X r r r 1 =

10

°C

1003 hPa

15

°C

1005 hPa

20

°C

1010 hPa

25

°C

1011 hPa

30

°C

1014 hPa

1.

n=

REG