Linear Regression; Quadratic Regression - Casio fx-350TL User Manual

• Linear Regression

The regression formula for linear regression is: y
• Example: Atmospheric Pressure vs. Temperature
Temperature
10°C
15°C
20°C
25°C
30°C
Enter REG Mode (Linear Regression)
q q 2 1
fx-85W:
Other models:
A m =
P
10
P
20
(Regression Coefficient A)
(Regression Coefficient B)
(Correlation Coefficient
(Atmospheric Pressure at 18°C)
(Temperature at 1000 hPa)

• Quadratic Regression

• The regression formula for quadratic regression is:
y
= A + B
• Input data using the following key sequence.
x
< -data>
Atmospheric
Pressure
1003 hPa
1005 hPa
1010 hPa
1011 hPa
1014 hPa
q 3 1
(Memory Clear)
S
1003
S
1010
r
)
x x
2
+C .
P
y
< -data>
Perform linear regression to deter-
mine the regression formula terms
and correlation coefficient for the
data nearby. Next, use the regres-
sion formula to estimate atmos-
pheric pressure at 18°C and tem-
perature at 1000 hPa.
P
15 1005
P
25 1011
P
30 1014
A q =
A w =
A J =
A b
18
A O
1000
S
E-21
S
S
S
0.982607368
4.642857143
A Bx.
00
30.
REG
00
997.4
00
0.56
00
00
1007.48
00