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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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p<br />

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

confronto <strong>tra</strong> me<strong>di</strong>e<br />

La <strong>di</strong>mensione del campione ha influito<br />

sulla significatività del test ?<br />

x − μμ<br />

z =<br />

σ n<br />

16 − 16 . 5<br />

0 = = −<br />

2<br />

85<br />

2.<br />

30<br />

= P(<br />

z ≥ 2.<br />

30)<br />

+ P(<br />

z ≤ −2.<br />

30)<br />

= 0.<br />

01+<br />

0.<br />

01=<br />

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

0.<br />

02

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