Variabel Betydning

tTestværdi

P ( t )

Repræsenterer den kumulative andel af

 

standardnormalfordelingen, der er mindre end

 

værdien t

 

R ( t )

Repræsenterer den kumulative andel af

 

standardnormalfordelingen, der ligger

 

mellemværdien t og 0. R ( t ) =1 – p ( t )

Q ( t )

Repræsenterer den kumulative andel af

 

standardnormalfordelingen, der er større end

 

værdien t

Q ( t ) = 0.5 – R ( t )

„Lineær regression

Trin : ( Se eksempel 56 )

1.Med datasættene i 2–VARmode som udgangspunkt skal du trykke på [ STATVAR ] og rulle gennem menuen med

statistiske resultater ud fra [

] eller [

] for at finde a, b

eller r.

 

 

2.Hvis du vil forudsige en værdi for x (eller y) ud fra en given værdi for y (eller x), skal du vælge variablen x ' (eller y '),

trykke

på [

], indtaste den givne værdi og trykke på

[

] igen. ( se tabellen nedenfor ).

Variabel

Betydning

ay-intercept for lineær regression

a = ∑ y − b ∑ x

n

b

Hældningskoefficient for lineær regression

 

b =

(n∑ xy − ∑ x∑ y)

 

 

(n∑ x2 − (∑ x)2 )

 

 

rKorrelationskoefficient

 

r =

 

 

(n∑ xy − ∑ x∑ y)

 

 

 

(n∑ x2 − (∑ x)2 )(n∑ y2 − (∑ y)2 )

 

 

 

x '

Forudsagt x-værdi givet værdierne a, b og y

 

x' =

 

y − a

 

 

 

b

 

 

 

y '

Forudsagt y-værdi givet værdierne a, b og y.

 

y' = a + bx

Da – 18

File name : CBM_SR285,A_HDBSR285T19_Danish.doc

version : 2010/04/26

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Citizen SRP-280N/SRP-285N manual „ Lineær regression
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