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Statistikk
Standardfeil, standard error mean, Std error, SEx
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25.Mar 2018
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Table of Contents
maxLevel
3
Excerpt
Brukes til
Sammenligning av grupper
Hypotesetesting.
Konfidensintervaller.
Formler
Enten:
Standardavvik/rot(n)
ROT( p*(1-p)
)/n
)
ROT(
(H0 * (1-punktestimat H0))/n
)
ROT((H0*(1-H0))/n)
Standardfeil ved sammenligning av 2 grupper:
rot((
Standardavvik
1^2/n1)+(Standardavvik2^2/n2))
Feks
n1=106
n2=115
S1=1,24
S2=1,2
Feilmargin, E
= rot((1,24^2/106)+(1,2^2/115))=0,16418
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