Let Y denote thenumberofpeopleknownpersonallyinoneslifetimewhocommittedsuicide. AccordingtoarecentGeneralSocialSurvey,forarandomlychosenpersonintheU.S.,the probabilitydistributionof Y is approximately: P(0) = 0.48,P(1) = 0.24,P(2) = 0.15,P(3) =

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Let Y denote thenumberofpeopleknownpersonallyinone’slifetimewhocommittedsuicide.

AccordingtoarecentGeneralSocialSurvey,forarandomlychosenpersonintheU.S.,the probabilitydistributionof Y is approximately: P(0) = 0.48,P(1) = 0.24,P(2) = 0.15,P(3) =

0.07,P(4) = 0.03,P(5) = 0.02,P(6) = 0.01. Findthemeanoftheprobabilitydistribution.Using equation (2.3),findthestandarddeviation.

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