fff團團長比伯
2018-04-18 03:2408.單選題 收藏 標(biāo)記 糾錯 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. 老師您好，請問這個問題 怎么知道是不是拒絕原假設(shè)。
所屬：CFA Level I 視頻位置 相關(guān)試題
來源： 視頻位置 相關(guān)試題
1個回答
張瑋杰助教
2018-04-18 11:45
該回答已被題主采納
同學(xué)你好，拒絕或不拒絕原假設(shè)可以根據(jù)下圖來判斷，另，單尾或者是雙尾可以根據(jù)關(guān)鍵值來判斷，5%的顯著性水平對應(yīng)1.96的關(guān)鍵值，說明是一個雙尾檢驗，因為單尾檢驗在5%的置信水平下，關(guān)鍵值是1.645，這是可以根據(jù)查表得到的。
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追問
老師不是說判斷單位雙尾不是看原假設(shè)是不等 ，單位是大于小于這樣區(qū)分的嗎。
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追答
同學(xué)你好，通過你說的這個方法看的是備擇假設(shè)的符號，而不是原假設(shè)，題中寫了原假設(shè)是等于0，而備擇假設(shè)是不等于0，那么也可以根據(jù)這個方法來判斷
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