生物統計 變異係數 - 考試
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By Charlie
at 2013-07-03T17:18
at 2013-07-03T17:18
Table of Contents
最近有在做王雪編的生統題庫
對於一些選項有些問題希望各位幫忙
1.變異係數(coefficient of variance)其值介於0和1之間 ? (O)
感覺上好像很合理 不過曾經做過一個台大的題目 算出來的變異系數是1.05
另外由公式來看→ s/X 只要標準差很大應該就會超過1吧
不知道是不是答案給錯?
2.雙尾統計考驗、alpha=0.05 P=0.012
(1)應以P與alpha比較來決定是否推翻虛無假說
(2)結果可推翻虛無假說,但可能錯的機率為P=0.012
(3)結果不能推翻虛無假說
答案給(2)。
不過我覺得是(1) reject的話可能錯的機率應該是alpha=0.05吧?(type 1 error) QAQ
P.S我是要準備台大獸醫大二轉學考,不過沒有考古題,想說買題庫來練
((但不知道題庫有沒有要勘誤的地方??))
只寫題庫能囊括全部的範圍嗎??(這樣是準備太多或太少?XDD)
希望有經驗的人可以寄站內信或推薦我準備生統的方法
有許多範圍其實不知道重要還是不重要?(ROC曲線、柴比雪夫、複回歸...等?)
拜託能夠幫助我的人伸出您的援手吧!!
謝謝大家!! >m<
--
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