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A group of nursing students compared two brands of pain reliever and test the average time of each to take effect. For each brand, the

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A group of nursing students compared two brands of pain reliever and test the average time of each to take effect. For each brand, the following was determined. Assume unknown and equal variances, test the hypothesis that there is no signicant difference between the average time of Brand X and Y to take effect using 0.01 as level of signicance

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