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t-Test for the Significance of the Difference between the Means of Two Independent Samples
瀏覽：1229
日期：2026-04-19
then the research hypothesis is directional and permits a one-tail test of significance. A non-directional research hypothesis would require a two-tail test, as it is the equivalent of saying "I'm expecting a difference in one direction or the other, but ...看更多
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