有限樣本場(chǎng)合下Meta分析中的假設(shè)檢驗(yàn)問(wèn)題
[Abstract]:Meta-analysis (meta-analysis) is a statistical inference method that combines the results obtained from different scientific activities for the same scientific problem. In this paper, we investigate the hypothesis testing problem of heterogeneity variance of random effect models commonly used in meta-analysis. Based on spectral representation, we give the restrictive likelihood ratio test (restricted likelihood ratio test,) under the original hypothesis. That is, the equivalent form of exact distribution of RLRT) statistics. The accurate distribution of the above statistics is simulated by using the parametric bootstrap method, and the hypothesis testing method under finite samples is designed accordingly. Simulation results show that the proposed method has better properties than the method based on large sample theory and RLRT based on asymptotic distribution in the case of finite samples. When the sample size is large, the proposed method is very similar to the existing method. Finally, as a demonstration, the proposed method is used to analyze a set of BCG data. This method is suitable for the small sample situation, which effectively makes up for the shortcomings of the traditional method based on the large sample theory, and makes it possible to obtain a new solution in the future when the problem of heterogeneity test in the meta-analysis is encountered.
【學(xué)位授予單位】:云南財(cái)經(jīng)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:O212.1
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