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Met 3431 Statistikk Kapittel 6

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Rekrutter 2<br />

Example<br />

Hva er sannsynligheten for at en tilfeldig rekrutt er høyere enn 175<br />

cm?<br />

0,4<br />

0,35<br />

0,3<br />

0,25<br />

0,2<br />

0,15<br />

0,1<br />

0,05<br />

1 z-verdien til 175:<br />

z = 175−179.5<br />

6.4<br />

= −0.70<br />

2 P(z > −0.70) =<br />

1 − P(z < −0.70) =<br />

1 − 0.242 = 0.758<br />

3 75.8% sannsynlighet for at en<br />

rekrutt er høyere enn 175cm<br />

-2,4 -1,6 -0,8 0 0,8 1,6 2,4<br />

-0,05

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