单侧检验要注明 2．建立假设 一种是检验假设（hypothesis under test） ， 记为 H 0 ；另一种是备择假设alternative hypothesis 记为 H 1 ，是与 H 0 相联系且对立的假设。
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To test your null hypothesis, you want to know the probability of obtaining a value this extreme under the assumption that it is due to random sampling variability.
要检验虚假设，需要知道在假设存在随机抽样可变性的情况下获得这么一个极限值的概率。
Objective to test the hypothesis that collagen is a significant determinant of skin viscoelasticity, with particular attention paid to the thermomechanical properties of skin under dynamic loading.
目的检验关于胶原蛋白是皮肤黏弹性主要决定因素的假设，重点考察皮肤组织在动态载荷下的热力学性能。
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