Hp 10s Scientific Calculator User Manual download pdf (Page 28)

Ai?

Temperature

Atmospheric

Pressure

ЮЪ

1003 hPa

1513

1005 hPa

2013

1010 hPa

2513

101 1 hPa

ЗОЮ

1014 hPa

Linear Regression

The formula for linear regression is i/=A+Bx

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 con then be used to

determine air temperature at a

particular pressure (lOOOhPa)

and the air pressure at a

particular temperature (—5t:).

in the process, we also

determine the coefficient of

determination (r^)

and the

sample covariance _ _

In regression (REG) mode: ( ^xy

___

П’ x • у ^

(mode 3 ) □□ (Lin)

[»t| ГП (Scl) В (Stat clear)

10 И 1003®

Each time you press ® , the data you have just

entered is stored. The n = value shown on the screen

indicates the number of data pairs you have entered.

15 И 1005®

20 И 1010® 25 И 101 1®

ЗОИ 1014®

Regression coefficient A=997.4 gS] [jg ® ® Щ В

Regression coefficient B=0.56 gS] [ig ® ® Щ В

Regression coefficient

i^O.982607368 H H H H H H

The atmospheric pressure when the air temperature is — 5"C

=994.6 ШИ5ИННННННН

The air temperature when atmospheric pressure is 1000 hPa

n-1

=4.642857143 1000 1

Coefficient of determination

=0.965517241

Sample covariance=35

]® ® ® ®|

1НННШИН

□□ [m] [Hi] ® Щ H

I и i!l M я ГП

ннншшн

itrl |Ш| ГТ] в 1 щ в

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Hp 10s Scientific Calculator User Manual Page 28

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