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fff团团长比伯2018-04-18 03:24:19

08.单选题 收藏 标记 纠错 An analyst conducts a significance test to determine if the relation between two variables is real or the result of chance. His null hypothesis is that the population correlation coefficient is equal to zero and his alternative hypothesis is that the population correlation coefficient is different from zero. He gathers the following information: The analyst most likely conducted a: A One-tailed test and can reject his null hypothesis. B Two-tailed test and can reject his null hypothesis. C Two-tailed test and cannot reject his null hypothesis. 老师您好,请问这个问题 怎么知道是不是拒绝原假设。

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张玮杰2018-04-18 11:45:43

同学你好,拒绝或不拒绝原假设可以根据下图来判断,另,单尾或者是双尾可以根据关键值来判断,5%的显著性水平对应1.96的关键值,说明是一个双尾检验,因为单尾检验在5%的置信水平下,关键值是1.645,这是可以根据查表得到的。

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老师不是说判断单位双尾不是看原假设是不等 ,单位是大于小于这样区分的吗。
追答
同学你好,通过你说的这个方法看的是备择假设的符号,而不是原假设,题中写了原假设是等于0,而备择假设是不等于0,那么也可以根据这个方法来判断

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