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【单选题】
成组设计两样本均数比较时,若已知样本均来自正态总体,且总体方差相等,则可作A.
配对 t 检验
B.
两独立样本ｔ检验
C.
ｔ＇检验
D.
秩和检验
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举一反三
【简答题】听下面一段对话，回答1-3题。 1. What’s the weather like? A. Rainy. B. Cold. C. Fine and warm. 2. Where are they talking? A. In the station. B. In the park. C. At the station. 3. What does the woman come here for? ...
【简答题】听对话回答问题。 1. What's the weather like today? A. Rainy B. Sunny C. Windy 2. How many hours does the exhibition last every day? A. Ten hours B. Four and a half hours C. Six and a half hours 3. Where are t...
【单选题】— What ’ s the weather like today? — .
A.
I don ’ t like it.
B.
All right
C.
It ’ fine.
D.
You ’ re right
【简答题】Passage 2 What will the weather be like? Some people say they can know what the weather will be like from birds. When they see birds fly high out to the sea, they know it is a nice day, because birds ...
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