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Test di ipotesi Confronto tra medie e proporzioni

Test di ipotesi Confronto tra medie e proporzioni

Test di ipotesi Confronto tra medie e proporzioni

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<strong>Test</strong> <strong>di</strong> <strong>ipotesi</strong> p bilaterale:<br />

confronto <strong>tra</strong> <strong>proporzioni</strong><br />

H<br />

H<br />

0<br />

1<br />

:<br />

:<br />

p<br />

p<br />

=<br />

≠<br />

0.<br />

082<br />

0.<br />

082<br />

Fissiamo il livello <strong>di</strong> significatività pari a 0.01<br />

z<br />

=<br />

pˆ<br />

−<br />

p<br />

p ( 1 1−<br />

p ) n<br />

=<br />

0.<br />

115<br />

0 . 082<br />

−<br />

0.<br />

082<br />

( 1 1−<br />

0 . 082 ) 60<br />

=<br />

0.<br />

93<br />

P ( z ≥ 0.<br />

93 ) + P ( z ≤ −0.<br />

93 ) = 0.<br />

17 + 0.<br />

17 =<br />

0.34 > 0.05 ⇒ non si rifiuta l’<strong>ipotesi</strong> nulla<br />

0.<br />

34

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