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Mathematics, 20.04.2020 23:07 aliyyahlove
One major reason that the two-sample t procedures are widely used is that they are quite robust. What does this mean? t procedures do not require that we know the standard deviations of the populations. Confidence levels and P-values from the t procedures are quite accurate even if the population distribution is not exactly Normal. t procedures compare population means, a comparison that answers many practical questions.
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