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Samplingisastatisticalprocedurethatisconcernedwiththeselectionofthe

individualobservation;ithelpsustomakestatisticalinferencesaboutthe

population.

Insampling,weassumethatsamplesaredrawnfromthepopulationandsample

meansandpopulationmeansareequal.Apopulationcanbedefinedasawhole

thatincludesallitemsandcharacteristicsoftheresearchtakenintostudy.

However,gatheringallthisinformationistimeconsumingandcostly.We

thereforemakeinferencesaboutthepopulationwiththehelpofsamples.

Therearetwobranchesinstatistics,descriptiveandinferentialstatistics.Of

thesetwomainbranches,statisticalsamplingconcernsitselfprimarily

withinferentialstatistics.Thebasicideabehindthistypeofstatisticsistostart

withastatisticalsample.Afterwehavethissample,wethentrytosay

somethingaboutthepopulation.Weveryquicklyrealizetheimportanceofour

samplingmethod.