101初等統計學大意 - 考試
By Hazel
at 2012-12-24T23:52
at 2012-12-24T23:52
Table of Contents
關於「分層抽樣」(Stratified sampling),下列敘述何者為真?
(A)可去除「總變異」(Total variation)
(B)可去除「組間變異」(Variation between group)
(C)可去除「組內變異」(Variation within group
(D)希望各層是母體的縮影
分層抽樣不是層間變異大 層內變異小嗎
不解答案為何是(B)
懇請高手指教
謝謝
--
(A)可去除「總變異」(Total variation)
(B)可去除「組間變異」(Variation between group)
(C)可去除「組內變異」(Variation within group
(D)希望各層是母體的縮影
分層抽樣不是層間變異大 層內變異小嗎
不解答案為何是(B)
懇請高手指教
謝謝
--
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考試
All Comments
By Heather
at 2012-12-29T01:51
at 2012-12-29T01:51
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