问题
单项选择题 A1型题
回归系数b的t检验，其自由度v为（）。
A.2n-1
B.n
C.n-1
D.n-2
E.以上说法都不对
答案
参考答案：D
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回归系数b的t检验，其自由度v为（）。
A.2n-1
B.n
C.n-1
D.n-2
E.以上说法都不对
参考答案：D
A king is old and he knows it is time to choose (选择) a new king. He all the young people in his country,“I will give of you a seed (种子). Plant it and it back here one year later. Show me the plants (植物) you bring, I’ll choose a new king from you.” A boy named Peter gets a seed, too. He it carefully. But the seed doesn’t grow at all. A year later, Peter take his empty (空的)box to the palace (宫殿). Others all take beautiful plants there and Peter feels . The king gets to the palace and looks around. When he finds there is nothing Peter’s box, the king smiles and says to the others,“One year ago, I gave everyone a seed. In fact (事实上), all the seeds can’t grow. But all of you, except (除了) Peter, brings me beautiful plants. Peter is the one with the honesty (诚实) to bring me such a box. So he will be the new !”
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