Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution
碩士 === 國立中央大學 === 統計研究所 === 96 === For a 2 × 2 contingency table sampled from multinomial distribution, we are interested in measuring strength of association between two variables by the odds ratio. Also constructing a confidence interval for the odds ratio is primarily of concerned in practice. Fo...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2008
|
Online Access: | http://ndltd.ncl.edu.tw/handle/32n7je |
id |
ndltd-TW-096NCU05337018 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-096NCU053370182019-05-15T19:18:54Z http://ndltd.ncl.edu.tw/handle/32n7je Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution 多項分布2×2列聯表勝算比之區間估計 CHEN-HSUAN WU 吳晨瑄 碩士 國立中央大學 統計研究所 96 For a 2 × 2 contingency table sampled from multinomial distribution, we are interested in measuring strength of association between two variables by the odds ratio. Also constructing a confidence interval for the odds ratio is primarily of concerned in practice. For the multinomial sampling, there are two nuisance parameters except for the odds ratio. Hence we usually take the exact conditional approach to obtain a confidence interval for the odds. However, the exact conditional confidence interval can be very conservative because the exact conditional approach may use a high discrete conditional distribution when the sample size is small. On the other hand, the exact unconditional approach eliminates the nuisance parameters by taking the maximal p-value over all possible values of the nuisance parameters. In this paper, we take the unconditional approach to obtain a modified confidence interval. For small to moderate sample sizes, numerical studies show that comparing to other interval the modified confidence interval usually has shorter length, and its actual confidence coefficient is closer to and at least the nominal confidence coefficient. Ming-Chung Yang 楊明宗 2008 學位論文 ; thesis 60 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 國立中央大學 === 統計研究所 === 96 === For a 2 × 2 contingency table sampled from multinomial distribution, we are interested in measuring strength of association between two variables by the odds ratio. Also constructing a confidence interval for the odds ratio is primarily of concerned in practice. For the multinomial sampling, there are two nuisance parameters except for the odds ratio. Hence we usually take the exact conditional approach to obtain a confidence interval for the odds. However, the exact conditional confidence interval can be very conservative because the exact conditional approach may use a high discrete conditional distribution when the sample size is small. On the other hand, the exact unconditional approach eliminates the nuisance parameters by taking the maximal p-value over all possible values of the nuisance parameters. In this paper, we take the unconditional approach to obtain a modified confidence interval. For small to moderate sample sizes, numerical studies show that comparing to other interval the modified confidence interval usually has shorter length, and its actual confidence coefficient is closer to and at least the nominal confidence coefficient.
|
author2 |
Ming-Chung Yang |
author_facet |
Ming-Chung Yang CHEN-HSUAN WU 吳晨瑄 |
author |
CHEN-HSUAN WU 吳晨瑄 |
spellingShingle |
CHEN-HSUAN WU 吳晨瑄 Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution |
author_sort |
CHEN-HSUAN WU |
title |
Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution |
title_short |
Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution |
title_full |
Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution |
title_fullStr |
Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution |
title_full_unstemmed |
Interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution |
title_sort |
interval estimation for the odds ratio of a 2 × 2 contingency table from multinomial distribution |
publishDate |
2008 |
url |
http://ndltd.ncl.edu.tw/handle/32n7je |
work_keys_str_mv |
AT chenhsuanwu intervalestimationfortheoddsratioofa22contingencytablefrommultinomialdistribution AT wúchénxuān intervalestimationfortheoddsratioofa22contingencytablefrommultinomialdistribution AT chenhsuanwu duōxiàngfēnbù22lièliánbiǎoshèngsuànbǐzhīqūjiāngūjì AT wúchénxuān duōxiàngfēnbù22lièliánbiǎoshèngsuànbǐzhīqūjiāngūjì |
_version_ |
1719087835911290880 |