I Linear regression
Example
Operation
Display
•Relationship between temper
ature and the length of a
steel bar
Temperature
Length
10°C
1003mm
15°C
1005mm
20°C
1010mm
25°C
1011mm
30°C
1014mm
The data in the above table
can be used to obtain the
terms of the regression for
mula and the correlation coeffi
cient. Based on the regression
formula, the estimated length
of the steel bar at 18°C and
the temperature when the bar
is 1000 mm long can be calcu
lated. The critical coefficient
(r2) and covariance
/ Lxy-n»x - J \
\ « - 1 )
can also be calculated.
(Clears memory)
10 d a s 1003ID
15 lsiiiFTir»110 0 5 ÎPT1
20S)E31010(dt)
25®|T]1011(H)
30®CD1014G>3
(Constant term A) iSHifTlfXlfiji)
(Regression coefficient B)
is ü flfB li^ l
(Correlation coefficient r) fSHÏFÏlITlfilxI)
(Length at 18°C) 1 8 IÜ Q lE ( d l
(Temperature at 1000mm)
A o o o m m m
(Critical coefficient) |shift|(T
(Covariance)
m ram acüafwiEiBiiii
( S Q B E J C D B C D illlw )
B1QDH“ )
1*.
15.
2 «.
25.
3«.
997.4
0.56
0.9826073689
1007.48
4.642857143
0.9655172414
35.
’ Erroneous data clearing/correction (correct data operation: 10I5BHT|iqo3I5t|)
© If 11 S O I 003 is entered, enter correct data after pressing 03.
© If 11 B E 1003® is entered, enter correct data after pressing |cl).
© If 11 B E 1003® was entered previously, enter correct data after pressing
11 BC D 1 0 0 3 ® .
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