U linear regression – Casio FX-820MS User Manual

Page 28

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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:

y

= A + B

x

.

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 (

r

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 (

n

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

r

= 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 =

Temperature

Atmospheric

Pressure

10

°C

1003 hPa

15

°C

1005 hPa

20

°C

1010 hPa

25

°C

1011 hPa

30

°C

1014 hPa

1.

n=

REG

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