ACCA《F4公司法与商法》精选讲义第一章(2)

首页 > 情感婚姻 > 文章

ACCA《F4公司法与商法》精选讲义第一章(2)

  Session2Sourcesofdata  Maincontents:          Datacanbeclassifiedasfollows:  (a)Primaryandsecondarydata  Primarydataaredatacollectedespeciallyforaspecificpurpose.  Secondarydataaredatawhichhavebeencollectedelsewhere,forsome  otherpurposes,butwhichcanbeusedoradaptedforthe  surveybeingconducted.  (b)Discreteandcontinuousdata  Discretedataaredatawhichcanonlybetakenonafiniteorcountable  numberofvalueswithinagivenrange.  Continuousdataaredatawhichcantakeonanyvalue.  (c)Sampleandpopulationdata  Sampledataaredataarisingasaresultofinvestigatingasample  Populationdataaredataarisingasaresultofinvestigatingthepopulation.    Themainsourcesofsecondarydataare:governments;banks;newspaper;tradejournals;informationbureau;consultancies;librariesandinformationservices.  -Itisessentialtobelievethatthesecondarydatausedisaccurateandreliable.    ,thesurveyiscalledacensus.  Therearetwotypesofsamplingmethods:  Probabilitysamplingmethodisasamplingmethodinwhichthereisaknownchanceofeachmemberofthepopulationappearinginthesample.  -Random  -Stratifiedrandom  -Systematic  -Multistage  -Cluster  Ifrandomsamplingisused,itisnecessarytoconstructasamplingframe.  Asamplingframeshouldhavefollowingcharacteristics  -completeness  -accuracy  -adequacy  -uptodateness  -convenience  -non-duplication  Nonprobabilitysamplingmethodisasamplingmethodinwhichthechanceofeachmemberofthepopulationappearinginthesampleisnotknow,  Example1:  Thefollowingstatementsrelatetowhichdifferenttypesofdata  (i).Secondarydataaredatacollectedespeciallyforaspecificpurpose  (ii).Discretedatacantakeonanyvalue.  (iii)Qualitativedataaredatathatcannotbemeasured  (iv).Populationdataaredataarisingasaresultofinvestigatingagroupofpeopleor  Objects.  Whichofthestatementsaretrue  A.(i)and(ii)only  B.(ii)and(iii)only  C.(ii)and(iv)only  D.(iii)and(iv)only  SolutionisD  Itisprimarydatathatiscollectedforaspecificpurposeso(i)(ii)(iii)and(iv)aretrue.  Example2:  Whichofthefollowingstatementsarenottrue  IIfasampleisselectedusingrandomsampling,itwillbefreefrombias.  IIAsamplingframeisanumberedlistofallitemsinasample.  IIIInclustersamplingthereisverylittlepotentialforbias.  IVInquotasampling,investigatorsaretoldtointerviewallthepeopletheymeet  Uptoacertainquota.  AI,II,IIIandIV  BI,IIandIII  CIIandIII  DIIonly  SolutionisC  Asamplingframeisanumberedlistofallitemsinapopulation(notasample)  Clustersamplinginvolvesselectingonedefinablesubsectionofthepopulationwhichthereforemakesthepotentialforbiasconsiderable.。