chapter  9
29 Pages

The comparison of sample values–II (Parametric tests)

InthegeneraldiscussionofsignificancetestingatthebeginningofChapter8,itwasindicatedthatagroupofteststermed'parametric'existed thatcouldbeusedinrelationtosampledatarecordedinintervalorratio units.Anumberofunderlyingassumptionswerealsostressed,these assumptionsessentiallyapplyingtovariouscharcteristicsofthepopulation fromwhichthesamplehadbeenselected.Havingconsideredinthe previouschaptersomeofthesimplerandless-demandingnon-parametric testsforwhichmostoftheseassumptionswerenotrelevant,itisnow necessarytoreviewthebasicparametrictestswhich,whentheyare applicable,providemorestringentassessmentsofstatisticalsignificance.