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...The r s b n level measurement data treatment appropriate tests parametric statistics analysis of differences compare means contents t test independent samples paired one way anova quick facts number variables x dependent y scale variable categorical with two values binary eg sex continuous ratio interval in many real life situations we cannot determine exact value population mean are only interested comparing populations using a random sample from each called such experiments where detecting between groups is used to whether has different method for unrelated e g example you may want see if salary differs male and female teachers among it another...