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Konfidensintervaller Hypotesetest og

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Test af middelværdi<br />

Antagelse: Test af μ, X kvantitativ variabel <strong>og</strong> n>30.<br />

Hypoteser:<br />

X<br />

middelværdi μ0 <strong>og</strong> standard afvigelse σ<br />

(to-sidet<br />

test)<br />

Stikprøvefordeling af når H 0 er sand er approksimativ normal med<br />

Teststørrelse:<br />

Z<br />

H<br />

H<br />

0<br />

1<br />

=<br />

: μ = μ<br />

: μ ≠ μ<br />

X − μ0 σ n<br />

0<br />

0<br />

n<br />

μ x<br />

0 z<br />

0<br />

standardisering

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