HW_6_due_Fri_10.28_

If20000taxbills aresentoutfindtheprobabilitythat

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Unformatted text preview: tomersvisitingthestereosectionofalargeelectronicsstore,only25%makea purchase.If70customersvisitthestereosectiontomorrow,findtheprobabilitythat morethan20willmakeapurchase.  3. Itisknownfrompastexperiencethat9%ofthetaxbillsarepaidlate.If20,000taxbills aresentout,findtheprobabilitythat (a)Fewerthan1750arepaidlate. (b)2000ormorearepaidlate.  4. Anaptitudetestadministeredtoaircraftpilottraineesrequiresaseriesofoperationsto beperformedinquicksuccession.Supposethatthetimeneededtocompletethetestis normallydistributedwithmean=90minutesandsd=20minutes. (a) Topassthetest,acandidatemustcompleteitwithin80minutes.Whatpercentage ofthecan...
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