12.07.2015 Views

ESERCIZIO 1.1 I dati che seguono si riferiscono al periodo di ...

ESERCIZIO 1.1 I dati che seguono si riferiscono al periodo di ...

ESERCIZIO 1.1 I dati che seguono si riferiscono al periodo di ...

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Esercizi <strong>di</strong> Statisticaa. Un numero <strong>di</strong> soggetti minore o ugu<strong>al</strong>e a 5 <strong>si</strong>ad<strong>al</strong>tonico.P(X=x)=n!x!(n −⋅x)!px⋅ qn−xn=25 p=0.10 q=0.90P(X≤5)=P(X=0)+……+P(X=5)]PPPPPP((((((XXXXXX======0 )1)2 )3 )4 )5 )======25 !⋅ 0 .10! ⋅25 !25 !⋅ 0 .11! ⋅24!25 !⋅ 0 .12! ⋅23 !25 !⋅ 0 .13! ⋅22!25 !⋅ 0 .14! ⋅21 !25 !⋅ 0 .15! ⋅20!102345⋅ 0 .9⋅ 0 .9⋅ 0 .9⋅ 0 .9⋅ 0 .9⋅ 0 .9252423222120======0 .07180 .19940 .26590 .22650 .13840 .0646P(X≤5)==0.0718+0.1994+…+0.1384+0.0646=0.966647

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