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[考題] 103台南教育Q.85
[ studyteacher ]6 留言, 推噓總分: +2
作者: Yolanda99 - 發表於 2014/07/06 00:01(11年前)
1F推harlem77:Z與t的值有正有負，例如標準常態分佈之下的正負1.9607/06 00:23
2F→harlem77:t分佈不需事先知道母群變異數 所以需要自由度來推估母群07/06 00:25
3F→harlem77:變異數07/06 00:25
4F→harlem77:a是正解 當樣本數增大 t=z07/06 00:26
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