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無趨勢PBIB設計的建構和最佳化性質 / Construction and Optimality of Trend-free Versions of PBIB Designs

實驗設計中,我們假設在區塊中存在一趨勢效應(trend effect)。此趨勢效應影響觀察值,也影響我們對區塊效應(block effect)和處理效應(treatment effect)的估計。此種設計模式不同於一般的區塊設計模式,因此須將趨勢效應加人設計模式中。
  Bradley and Yeh (1980)研究和討論此種趨勢效應在區塊設計模式中之影響,並定義出無趨勢設計(trend-free design)。所謂無趨勢設計,乃是在區塊設計模式中,趨勢效應被抵消不影響處理效應之分析。Bradley and Yeh (1983)推導了一個線性無趨勢設計存在的必要條件是r(k+1)≡0(mod 2)其中k為區塊大小,r為處理出現的次數。
  Bradley and Yeh進一步預測任一滿足r(k+1)≡0(mod2)的區塊設計,經過在區塊中處理位置調整後,可變為一個線性無趨勢設計。本篇論文的主要目的乃是在探討給定一GD設計(group-divisibledesigns),檢驗和推導此預測是否為真。 / Yeh and Bradley conjectured that every binary connected block design with blocks of size k and a constant replication numberr for each treatment can be converted to a linear trend-free design by permuting the positions of theatments within blocks if and only if r(k+1)≡0 (mod 2). Chai and Majumdar (1993) proved that any BIB design which satisfies r(k+1)≡0 (mod 2) is even can be converted to a linear trend-free design. In this thesis, we want to examine this conjecture is true or not for group-divisible designs (GD designs).

Identiferoai:union.ndltd.org:CHENGCHI/B2002003895
Creators黃建中, Hwang, Chien Chung
Publisher國立政治大學
Source SetsNational Chengchi University Libraries
Language英文
Detected LanguageEnglish
Typetext
RightsCopyright © nccu library on behalf of the copyright holders

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