Zeinab Mashreghi

University of Winnipeg, Department of Mathematics and Statistics

“Resampling procedures in the presence of missing data applied to high entropy sampling designs”

Date: Thursday, October 12, 2017

In the absence of non-response, a class of bootstrap procedures consists of first creating a pseudo-population from the original sample. Bootstrap samples are then selected from this pseudo-population using the same sampling design utilized to select the original samples; see Booth et al. (1994), Holmberg (1998) and Chauvet (2007), among others. In the context of non-respondents, we develop pseudo-population type bootstrap procedures that can be used even for large sampling fractions to estimate the variance of an imputed estimator. These procedures can be applied to a large class of sampling designs, namely the class of high entropy sampling designs (Berger, 1998, 2011), that includes the Poisson sampling design, the conditional Poisson sampling design (Hàjek, 1964) and the Rao-Sampford design (Rao, 1965; Sampford, 1967). We present two bootstrap schemes: the first leads to a consistent bootstrap variance estimator with respect to the non-response model approach and the second leads to a consistent bootstrap variance estimator with respect to the imputation model approach.


Congratulations to our October, 2017 graduate: Bo Yun Min (M.Sc.).

Upcoming Exams

STAT 2220 A01 Midterm
Wednesday, October 25 at 5:30 p.m.

STAT 1000 Midterm
Monday, October 30 at 5:30 p.m.

Upcoming Seminars

Statistics seminar: Francis Zwiers: “Probable maximum precipitation estimation and uncertainty quantification using bivariate extreme value analysis” — Thursday, October 19 at 2:45 p.m., 301 Biological Sciences.

Interdisciplinary seminar: Francis Zwiers: “Changing Weather Extremes: Who or What is to Blame?” — Friday, October 20 at 3:30 p.m., Robert Schultz Theatre.

PIMS lecture: Melania Alvarez — Thursday, October 26 at 4 p.m., Robert Schultz Theatre.

Statistics seminar: Paul Gustafson — Thursday, November 2 at 2:45 p.m., 301 Biological Sciences.

Where are they now?

Llwellyn Maria Armstrong, M.Sc (1992)

Mostofa Sarkar, M.Sc. (2012)