问题如下图:
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选项:
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B. 
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解释:
为什么有的前面拿y算区域,而有的直接拿intercept+-slope*t
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老师 请问2.3是查表得到的吗 谢谢
Isn't 95% confinintervusing 1.96?
这道题最终是让求什么?标准误?估计值的标准误是什么?Y的估计的标准误嘛?系数的标准误和估计的标准误怎么区分怎么计算可以总结一下吗?谢谢了!这地方总犯糊涂
mioint or prectevalue 怎么求?有通用公式吗
置信区间不是bi+t*Sb1吗 为什么不是1.1163+2.03*S求解 没明白 求老师解答 谢谢