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ID:41359237
大小:248.00 KB
页数:9页
时间:2019-08-22
《SelectandDrawConclusions75选择和得出的结论》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Lesson7.5SelectandDrawConclusionsfromSamplesAugust16th2012p.268Vocabulary1)Population:groupofpeoplethatyouwantinformationaboutEx:sophomoresBrookwoodStudentsstudentsinGwinnettCountyregisteredvotersVocabulary2)Sample:part/subsetofpopulationA)Randomsample:everym
2、emberhasanequalchanceofbeingselectedB)Self-selectedsample:peoplevolunteerresponsesC)Systematicsample:ruleselectsmembersD)Conveniencesample:easy-to-reachmembersVocabulary3)Unbiasedsample:representsthepopulation4)Biasedsample:overorunderestimatesthepopulation.E
3、x:InasamplethatincludesallBHSstudents,youonlypollseniorsExampleOne:ClassifySamples1)LunchHabits:Abusinessreporterwantstosurveyworkersaboutwheretheyeatlunchduringatypicalworkweek.Identifythetypeofsampledescribedasaself-selected,systematic,convenienceorrandomsa
4、mpleandtellwhetherornotitisbiasedorunbiased.A)Thereporterwritesacolumnaskingworkerstocallaspecialphonenumberandidentifywheretheyeatlunchduringatypicalworkweek.__________________Isthisbiasedorunbiasedsampling?_________________________________Self-selectedUnbia
5、sedB)Thereporteraskseveryoneinthenewsroomwheretheyeatlunchduringatypicalworkweek.__________________Isthisbiasedorunbiasedsampling?_________________________________ConvenienceBiasedCLASSWORK…trythese8problemsp.269#’s1-2p.270#’s1-3p.271#’s1-3Keepyourpaperoutwh
6、enyoufinish.We’llchecktheanswersontheboard!P.2691)Systematic2)Unbiased,itrepresentsthepopulationP.2701)Random;Unbiased2)Convenience;Biased3)Systematic;BiasedP.2711)Self-selected;Unbiased2)Convenience;Biased3)Random;Unbiased
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