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1、ThinkStatsoDThinkStatsAllenB.DowneyBeijing•Cambridge•Farnham•Köln•Sebastopol•TokyoThinkStatsbyAllenB.DowneyCopyright©2011AllenB.Downey.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybepurchase
2、dforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:(800)998-9938orcorporate@oreilly.com.Editor:MikeLoukidesCoverDesigner:KarenMontgomeryProductionEdi
3、tor:JasminePerezInteriorDesigner:DavidFutatoProofreader:JasminePerezIllustrator:RobertRomanoPrintingHistory:June2011:FirstEdition.ThinkStatsisavailableundertheCreativeCommonsAttribution-NonCommercial-ShareAlike3.0UnportedLicense(http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode).T
4、heauthormaintainsanonlineversionathttp://www.greenteapress.com/thinkstats/thinkstats.pdf.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.ThinkStats,theimageofanarcherfish,andrelatedtradedressaretrademarksofO’ReillyMedia,Inc.Manyofthedes
5、ignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,Inc.wasawareofatrademarkclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbeentakeninthepreparationofthisbook,thepubli
6、sherandauthorassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcon-tainedherein.ISBN:978-1-449-30711-0[LSI]1309368976TableofContentsPreface.....................................................................ix1.StatisticalThinkingforProgrammers.....
7、..................................1DoFirstBabiesArriveLate?2AStatisticalApproach3TheNationalSurveyofFamilyGrowth3TablesandRecords5Significance7Glossary82.DescriptiveStatistics...................................................11MeansandAverages11Variance12Dist
