The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers. The "median" is the "middle" value in the ...SkiptomaincontentHomeLessonsAlphabeticallyInStudyOrderHWGuidelinesStudySkillsQuizFindLocalTutorsDemoMathHelp.comJoinMathHelp.comLoginSelectaCourseBelowStandardizedTestPrepACCUPLACERMathACTMathALEKSMathASVABMathCBESTMathCLEPMathFTCEMathGEDMathGMATMathGREMathHESIMathMathPlacementTestNESMathPERTMathPRAXISMathSATMathTEASMathTSIMathVPTMath+moretestsK12Math5thGradeMath6thGradeMathPre-AlgebraAlgebra1GeometryAlgebra2CollegeMathCollegePre-AlgebraIntroductoryAlgebraIntermediateAlgebraCollegeAlgebraHomeschoolMathPre-AlgebraAlgebra1GeometryAlgebra2SearchMean,Median,Mode,andRangePurplemathMean,median,andmodearethreekindsof"averages".Therearemany"averages"instatistics,buttheseare,Ithink,thethreemostcommon,andarecertainlythethreeyouaremostlikelytoencounterinyourpre-statisticscourses,ifthetopiccomesupatall.The"mean"isthe"average"you'reusedto,whereyouaddupallthenumbersandthendividebythenumberofnumbers.The"median"isthe"middle"valueinthelistofnumbers.Tofindthemedian,yournumbershavetobelistedinnumericalorderfromsmallesttolargest,soyoumayhavetorewriteyourlistbeforeyoucanfindthemedian.The"mode"isthevaluethatoccursmostoften.Ifnonumberinthelistisrepeated,thenthereisnomodeforthelist.ContentContinuesBelowMathHelp.comMean,Median,Mode,andRangeThe"range"ofalistanumbersisjustthedifferencebetweenthelargestandsmallestvalues.Findthemean,median,mode,andrangeforthefollowinglistofvalues:13,18,13,14,13,16,14,21,13Themeanistheusualaverage,soI'lladdandthendivide:(13+18+13+14+13+16+14+21+13)÷9=15AffiliateNotethatthemean,inthiscase,isn'tavaluefromtheoriginallist.Thisisacommonresult.Youshouldnotassumethatyourmeanwillbeoneofyouroriginalnumbers.Themedianisthemiddlevalue,sofirstI'llhavetorewritethelistinnumericalorder:13,13,13,13,14,14,16,18,21Thereareninenumbersinthelist,sothemiddleonewillbethe(9+1)÷2=10÷2=5thnumber:13,13,13,13,14,14,16,18,2113,13,