(2) types of data
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AppliedSta+s+csandCompu+ngLab
TYPESOFDATA
AppliedSta+s+csandCompu+ngLab
IndianSchoolofBusiness
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LearningGoals
WhatisData? NeedforclassifyingDataintoTypes DifferenttypesofData
VariousClassificaons
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Data
Recorded,relevantinformaon Notnecessarilyjustnumbers Anyrelevantfacts,figures,observaonsor
descriponsofthings
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NeedfordifferenttypesofData
Example:CarsDataCarTypePrice
Whatisthedifferencebetweenthesetwo?ThetypeofinformaonThequantyofinformaon
Hence,theneedfordifferenangbetweentheformsofData
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QualitaveandQuantaveData
Example: Type,MakeofCar,Rang
(Qualita+ve/Categorical)
Price,Mileage,Cylinders(Quan+ta+ve/Numeric)
Definions: Qualita+ve:Descripons,cannot
actuallybemeasured,placesdata
intocategories(akaCategorical
Data)
Quan+ta+ve:Measurements,numeric
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NominalandOrdinalScaleData
Qualitave: Type,Makeofacar(Nominal) Rangs(Ordinal)
Definions: Nominal:Simplyallocaonintodisnctcategories,notmeasuredor
ordered
Sex,Color,Naonality Ordinal:Classifiedbasedonwhethertheyhavemoreorlessofa
characterisc.Thesecategorieshavealogicalorderingbetweenthem
IncomeGroup,Rateacourseetc.
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IntervalandRaoScaledata
Quantave: Datethecarwasmanufacturedon(Interval) Price,Mileage(Ra+o)
Definions: Interval:allowsforthedegreeofdifferencebetweenitems,butnot
theraobetweenthem,arbitrarilydefinedZerovalue Temperature,Dates
Ra+o:permitsthecomparisonofdifferencesinvalues,hasafixedzerovalue
Area,height,weight,numberofcustomersenteringastoreinaday
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ScalesofMeasurement
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DiscreteandConnuousData
Cylinders(Discrete) Price(Con+nuous) Definions:
Discrete:finitenumberofvaluespossible,countable,spacebetweenanytwopossiblevaluesonthenumberline.
NumberofmesthepriceofstockAchangedbeforethemarketclosed:
Con+nuous:infinitepossiblevalues,formsaconnuum Timetakenforthestockpricetochangeforthesecondme(Inseconds
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Thankyou