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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