商务统计学2015期中考试卷

《商务统计学2015期中考试卷》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、《商务统计》期中考试试题PartI:单选题(每题2分，共60分)1.Theuniverseorntotalityofitemsorthings'1underconsiderationiscalleda)asample.b)apopulation.c)aparameter.d)astatistic.2.Whichofthefollowingismostlikelyapopulationasopposedtoasample?a)respondentstoanewspapersurvey.b)thefirst5studentscompletinganassignment.c

2、)everythirdpersontoarriveatthebank.d)registeredvotersinacounty.3.AstudyisunderwayinYosemiteNationalForesttodeterminetheadultheightofAmericanpinetrees•Specifically,thestudyisattemptingtodeterminewhatfactorsaidatreeinreachingheightsgreaterthan60feettall.Itisestimatedthattheforestcontains2

3、5,000adultAmericanpines.Thestudyinvolvescollectingheightsfrom250randomlyselectedadultAmericanpinetreesandanalyzingtheresults.Identifythevariableofinterestinthestudy.a)TheageofanAmericanpinetreeinYosemiteNationalForest.b)TheheightofanAmericanpinetreeinYosemiteNationalForest.c)Thenumberof

4、AmericanpinetreesinYosemiteNationalForest.d)ThespeciesoftreesinYosemiteNationalForest.4.TheBritishAirwaysInternetsiteprovidesaquestionnaireinstrumentthatcanbeansweredelectronically.Whichofthe4methodsofdatacollectionisinvolvedwhenpeoplecompletethequestionnaire?a)Publishedsourcesb)Experim

5、entationc)Surveyingd)Observation5.Tomonitorcampussecurity,thecampuspoliceofficeistakingasurveyofthenumberofstudentsinaparkingloteach30minutesofa24-hourperiodwiththegoalofdeterminingwhenpatrolsofthelotwouldservethemoststudents.IfXisthenumberofstudentsintheloteachperiodoftime,thenXisanexa

6、mpleofa)acategoricalrandomvariable.b)adiscreterandomvariable.c)acontinuousrandomvariable.d)astatistic.1.Aninsurancecompanyevaluatesmanynumericalvariablesaboutapersonbeforedecidingonanappropriaterateforautomobileinsurance.Arepresentativefromalocalinsuranceagencyselectedarandomsampleofins

7、ureddriversandrecorded,X,thenumberofclaimseachmadeinthelast3years,withthefollowingresults.Xfrecmencx1142183124551Referringtothetable,howmanytotalclaimsarerepresentedinthesample?a)15b)50c)111d)250(ForQ7andQ8)Asurveywasconductedtodeterminehowpeopleratedthequalityofprogrammingavai