行政公告
  • 行政公告
[Seminar] 財金系2015/1/9(五) 上午10:30邀請Prof. Pinyuen Chen演講
活動起日:2014-12-29 
發佈日期:2014-12-29 
瀏覽數:894  2017-02-12 更新

<<演講資訊>>

時間: 1/9(五) 10:30-12:00

地點: 管理學院一號館2F 冠德講堂

演講人: Prof. Pinyuen Chen

講題: Heteroscedasticity: From Hypothesis Testing to Ranking & Selection

 

Abstract:

I first review two Stein-type two-sample procedures for selecting the largest normal mean under heteroscedasticity: (1) Bechhofer, Dunnett, and Sobel (1954, Biometrika) for common unknown variance and (2) Dudewicz and Dalal (1975, Sankhya) for uncommon unknown variances. Stein’s idea was to take an initial sample from each population for variance estimation and then to utilize the estimated variance from the first sample in designing a second sample for testing.

Then I recall two procedures for comparing populations with a standard/control for the case of known variances: (1) Bechhofer & Turnbull (1976, JASA)’s approach in comparing normal means with a standard and (2) Thall, Simon, & Ellenberg (1988, Biometrika)’s two-stage selecting-and-testing approach in selecting the best treatment among several experimental treatments, provided that it is better than a control. In extending the results of above two procedures to heteroscedastic case, we apply Stein-type two-sample concept. Simulation comparisons will be presented to illustrate the proposed methodologies.

This talk is at an introductory level that is accessible to every student who has taken one mathematical statistics course.