Dr Garth Tarr

Dr Garth Tarr

Lecturer

School of Mathematical and Physical Sciences

Career Summary

Biography

Garth received his PhD in Mathematical Statistics from the University of Sydney and has held postdoctoral positions at the University of Sydney and the Australian National University. His diverse interests include robust statistics, data visualisation, model selection, econometric modelling, educational research, meat science and biostatistics. He has received a number of citations for his teaching and was awarded first prize for the best oral presentation by a student at the Australian Young Statisticians Conference (2013) as well as the EJG Pitman Prize for the most outstanding talk presented by a young statistician at the Australian Statistical Conference (2012).

Qualifications

  • PhD, University of Sydney
  • Bachelor of Science, University of Sydney
  • Bachelor of Commerce, University of Sydney

Keywords

  • model selection
  • robust statistics
  • statistics

Fields of Research

Code Description Percentage
010405 Statistical Theory 40
010401 Applied Statistics 30
010499 Statistics not elsewhere classified 30

Professional Experience

UON Appointment

Title Organisation / Department
Lecturer University of Newcastle
School of Mathematical and Physical Sciences
Australia

Academic appointment

Dates Title Organisation / Department
2/03/2015 - 26/06/2015 Research Fellow The University of Sydney
School of Mathematics and Statistics
Australia
7/04/2014 - 27/02/2015 Postdoctoral Research Fellow Australian National University
Mathematical Sciences Institute
Australia
1/10/2013 - 31/03/2014 Research Associate The University of Sydney
School of Mathematics and Statistics
Australia

Membership

Dates Title Organisation / Department
1/11/2015 -  International Biometrics Society International Biometrics Society
Australia
1/01/2014 -  American Statistical Association American Statistical Association
United States
1/01/2011 -  Australian Mathematical Society Australian Mathematical Society
Australia
1/01/2009 -  Statistical Society of Australia Inc. NSW SSAI
Australia

Professional appointment

Dates Title Organisation / Department
1/01/2015 -  Statistical Consultant

The Meat Standards Australia pathways committee is the pre-eminent meat science research and development committee in Australia comprised of academics and industry representatives.

Meat Standards Australia Pathways Committee
Australia

Awards

Award

Year Award
2016 Teaching Excellence and Contribution to Student Learning
Faculty of Science and Information Technology, University of Newcastle
2013 First prize for the best oral presentation by a student at the 2013 Australian Young Statisticians Conference
Statistical Society of Australia Inc.
2012 EJG Pitman Prize for the most outstanding talk presented by a young statistician at the 2012 Australian Statistical Conference
Statistical Society of Australia Inc.

Teaching Award

Year Award
2011 University of Sydney Vice-Chancellor’s Award for Systems that Achieve Collective Excellence in Teaching and Learning
The University of Sydney
2010 University of Sydney Business School Excellence in Tutoring Award
The University of Sydney

Invitations

Committee Member

Year Title / Rationale
2013 SSAI Young Statisticians Conference

Organiser

Year Title / Rationale
2017 International Conference on Robust Statistics
2017 Invited paper session ‘Advanced Graphical and Computational Methods’, International Conference on Econometrics and Statistics (EcoSta)
2015 Much more than U-statistics: A symposium to celebrate Neville C. Weber
2011 SSAI Young Statisticians Conference

Speaker

Year Title / Rationale
2016 International Conference on Computational Statistics
2016 Institute of Mathematical Statistics Asia Pacific Rim Meeting
2015 International meeting on beef and lamb carcase grading to underpin consumer satisfaction
2015 International Conference on Robust Statistics
2015 Much more than U-statistics: A symposium to celebrate Neville C. Weber

Teaching

Code Course Role Duration
STAT1070 Statistics for the Sciences
Faculty of Science and Information Technology, University of Newcastle
Course coordinator 25/07/2016 - 11/11/2016
STAT1070 Statistics for the Sciences
Faculty of Science and Information Technology, University of Newcastle
Compressed mode summer school offering
Coordinator 4/01/2017 - 24/02/2017
STAT1070 Statistics for the Sciences
The University of Newcastle - Faculty of Science and Information Technology
Course coordinator 22/02/2016 - 10/06/2016
MATH1905 Statistics (Advanced)
The University of Sydney
Lecturer and course coordinator 27/08/2013 - 27/11/2013
Edit

Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (11 outputs)

Year Citation Altmetrics Link
2018 Wang KYX, Menzies AM, Silva IP, Wilmott JS, Yan Y, Wongchenko M, et al., 'bcGST - an interactive bias-correction method to identify over-represented gene-sets in boutique arrays.', Bioinformatics, (2018)
DOI 10.1093/bioinformatics/bty783
2018 Tarr G, Muller S, Welsh AH, 'mplot: An R Package for Graphical Model Stability and Variable Selection Procedures', JOURNAL OF STATISTICAL SOFTWARE, 83 1-28 (2018)
DOI 10.18637/jss.v083.i09
Citations Scopus - 1Web of Science - 1
2018 Polkinghorne RJ, Philpott J, Perovic J, Lau J, Davies L, Mudannayake W, et al., 'The effect of packaging on consumer eating quality of beef', MEAT SCIENCE, 142 59-64 (2018)
DOI 10.1016/j.meatsci.2018.04.002
Citations Scopus - 1Web of Science - 1
2017 Konarska M, Kuchida K, Tarr G, Polkinghorne RJ, 'Relationships between marbling measures across principal muscles', MEAT SCIENCE, 123 67-78 (2017) [C1]
DOI 10.1016/j.meatsci.2016.09.005
Citations Scopus - 2Web of Science - 2
2016 Tarr G, Müller S, Weber NC, 'Robust estimation of precision matrices under cellwise contamination', Computational Statistics and Data Analysis, 93 404-420 (2016) [C1]
DOI 10.1016/j.csda.2015.02.005
Citations Scopus - 12Web of Science - 7
2015 Tarr G, Weber NC, Mueller S, 'The difference of symmetric quantiles under long range dependence', STATISTICS & PROBABILITY LETTERS, 98 144-150 (2015) [C1]
DOI 10.1016/j.spl.2014.12.022
Citations Scopus - 2Web of Science - 2
2015 Pethick, Thompson, Polkinghorne, Bonny, Tarr GM, Treford, et al., 'Prédiction de la qualité de la viande de ruminants (Prediction of quality of ruminant meat)', Viandes et produits Carnés (Meat and Meat Products), (2015)
2014 Dancer D, Morrison K, Tarr G, 'Measuring the effects of peer learning on students' academic achievement in first-year business statistics', Studies in Higher Education, (2014) [C1]

Peer-assisted study session (PASS) programs have been shown to positively affect students' grades in a majority of studies. This study extends that analysis in two ways: cont... [more]

Peer-assisted study session (PASS) programs have been shown to positively affect students' grades in a majority of studies. This study extends that analysis in two ways: controlling for ability and other factors, with focus on international students, and by presenting results for PASS in business statistics. Ordinary least squares, random effects and quantile regression models have been used to model data from first-year business statistics students. The findings indicate that the impact of PASS has remained highly significant in both years for both local and international students but is more pronounced for international students. We also find that lower-achieving students derive a higher marginal benefit from attending PASS than higher-achieving students using quantile regression. These findings are significant for institutions implementing similar programs as well as institutional efforts to enhance student performance and improve student retention, or specifically to support international students more effectively. © 2014 © 2014 Society for Research into Higher Education.

DOI 10.1080/03075079.2014.916671
Citations Scopus - 4Web of Science - 5
2012 Tarr G, 'Small sample performance of quantile regression confidence intervals', Journal of Statistical Computation and Simulation, 82 81-94 (2012) [C1]

Since the introduction of regression quantiles for estimating conditional quantile functions there has been ongoing research into how best to construct confidence intervals for pa... [more]

Since the introduction of regression quantiles for estimating conditional quantile functions there has been ongoing research into how best to construct confidence intervals for parameter estimates. The three main methods are direct estimation, rank test inversion and resampling methods. Kocherginsky et al. [Practical confidence intervals for regression quantiles, J. Comput. Graph. Statist. 14 (2005), pp. 41-55] gave an overview of some of the available procedures. Five years on, the aim of this paper is to revisit and extend their analysis, evaluating additional techniques with a focus on smaller sample sizes and more extreme conditional quantiles. In particular, we find the percentile bootstrap (pbs) to be an eminently viable alternative for confidence interval construction. We show that it provides empirical coverage probabilities generally as good as, or better than, the other more complex resampling methods. Furthermore, pbs confidence intervals typically exhibit smaller average lengths across a variety of models than those based on the rank inversion methods which, like the pbs, avoids explicitly estimating asymptotic variances. © 2012 Taylor and Francis Group, LLC.

DOI 10.1080/00949655.2010.527844
Citations Scopus - 8Web of Science - 8
2012 Tarr G, Müller S, Weber N, 'A robust scale estimator based on pairwise means', Journal of Nonparametric Statistics, 24 187-199 (2012) [C1]

We propose a new robust scale estimator, the pairwise mean scale estimator Pn, which in its most basic form is the interquartile range of the pairwise means. The use of pairwise m... [more]

We propose a new robust scale estimator, the pairwise mean scale estimator Pn, which in its most basic form is the interquartile range of the pairwise means. The use of pairwise means leads to a surprisingly high efficiency across many distributions of practical interest. The properties of Pnare presented under a unified generalised L-statistics framework, which encompasses numerous other scale estimators. Extensions to Pnare proposed, including taking the range of the middle t × 100% instead of just the middle 50% of the pairwise means as well as trimming and Winsorising both the original data and the pairwise means. Furthermore, we have implemented a method using adaptive trimming, which achieves a maximal breakdown value. We investigate the efficiency properties of the pairwise mean scale estimator relative to a number of other established robust scale estimators over a broad range of distributions using the corresponding maximum likelihood estimates as a common base for comparison. © 2012 American Statistical Association and Taylor & Francis.

DOI 10.1080/10485252.2011.621424
Citations Scopus - 4Web of Science - 5
TARR G, 'QUANTILE BASED ESTIMATION OF SCALE AND DEPENDENCE', Bulletin of the Australian Mathematical Society, 1-3 [C3]
DOI 10.1017/S0004972715000283
Show 8 more journal articles

Conference (1 outputs)

Year Citation Altmetrics Link
2015 Hendry GD, Tarr GM, Morrison K, 'The benefits of peer review versus peer observation: Facilitators¿ experiences in a peer assisted study program', London, United Kingdom (2015)

Software / Code (3 outputs)

Year Citation Altmetrics Link
2016 Tarr GM, Patrick E, 'edgebundleR: Circle plot with bundled edges', 0.1.4 (2016)
2015 Tarr GM, 'pairsD3: D3 scatterplot matrices', 0.1.0 (2015) [G1]
2015 Tarr GM, Mu¨ller S, Welsh AH, 'mplot: Graphical model stability and model selection procedures', 0.7.7, CRAN (2015) [G1]

Report (3 outputs)

Year Citation Altmetrics Link
2016 Tarr GM, 'Parallel computation in R', International Biometrics Society (2016)
2016 Tarr GM, 'Getting data into R' (2016)
2015 Tarr GM, Müller S, 'Much more than U-statistics: A symposium to celebrate Neville C. Weber' (2015)

Thesis / Dissertation (1 outputs)

Year Citation Altmetrics Link
2014 Tarr GM, Quantile Based Estimation of Scale and Dependence, University of Sydney (2014)
Edit

Grants and Funding

Summary

Number of grants 9
Total funding $53,456

Click on a grant title below to expand the full details for that specific grant.


20163 grants / $12,500

New Staff Grant$7,500

Funding body: Faculty of Science and Information Technology,The University of Newcastle

Funding body Faculty of Science and Information Technology,The University of Newcastle
Project Team

Garth Tarr

Scheme New Staff Grant Scheme
Role Lead
Funding Start 2016
Funding Finish 2016
GNo
Type Of Funding Internal
Category INTE
UON N

International Biometric Society Australasian Region Travel Grant$3,000

Travel grant to attend International Biometric Conference, Victoria, Canada, July 2016.


Funding body: International Biometric Society

Funding body International Biometric Society
Project Team

Garth Tarr

Scheme Early Career Researcher Travel Grant
Role Lead
Funding Start 2016
Funding Finish 2016
GNo
Type Of Funding External
Category EXTE
UON N

CARMA funding$2,000

Funding body: Priority Research Centre for Computer-Assisted Research Mathematics and its Applications (CARMA), The University of Newcastle

Funding body Priority Research Centre for Computer-Assisted Research Mathematics and its Applications (CARMA), The University of Newcastle
Project Team

Garth Tarr

Scheme Research Purposes
Role Lead
Funding Start 2016
Funding Finish 2016
GNo
Type Of Funding Internal
Category INTE
UON N

20153 grants / $7,100

International collaboration on beef and lamb carcase grading to underpin consumer satisfaction$3,000

Funding body: Meat and Livestock Australia

Funding body Meat and Livestock Australia
Project Team

David Pethick

Scheme MLA project L.EQT.1605
Role Investigator
Funding Start 2015
Funding Finish 2015
GNo
Type Of Funding External
Category EXTE
UON N

Australian National University Early Career Researcher Travel Grant$2,100

Funding body: Australian National University

Funding body Australian National University
Scheme Early Career Researcher Travel Grant
Role Lead
Funding Start 2015
Funding Finish 2015
GNo
Type Of Funding Internal
Category INTE
UON N

PVC Conference Assistance Grant$2,000

Funding body: Faculty of Science and Information Technology, The University of Newcastle | Australia

Funding body Faculty of Science and Information Technology, The University of Newcastle | Australia
Scheme PVC Conference Assistance Grant
Role Lead
Funding Start 2015
Funding Finish 2015
GNo
Type Of Funding Internal
Category INTE
UON N

20131 grants / $1,000

Statistical Society of Australia Inc. Golden Jubilee Travel Grant$1,000

Funding body: Statistical Society of Australia Inc.

Funding body Statistical Society of Australia Inc.
Scheme Golden Jubilee Travel Grant
Role Lead
Funding Start 2013
Funding Finish 2014
GNo
Type Of Funding External
Category EXTE
UON N

20121 grants / $25,000

Student diversity: What do we know about our students and how does it affect our teaching?$25,000

Funding body: The University of Sydney

Funding body The University of Sydney
Project Team

Meloni Muir

Scheme Widening Participation Grant
Role Investigator
Funding Start 2012
Funding Finish 2013
GNo
Type Of Funding Internal
Category INTE
UON N

20101 grants / $7,856

Knowing your students: A faculty wide initiative to provide student demographic data to support curriculum change$7,856

Funding body: The University of Sydney

Funding body The University of Sydney
Project Team

Kellie Morrison

Scheme Small Teaching Improvement and Equipment Scheme
Role Investigator
Funding Start 2010
Funding Finish 2011
GNo
Type Of Funding Internal
Category INTE
UON N
Edit

Dr Garth Tarr

Position

Lecturer
Statistics
School of Mathematical and Physical Sciences
Faculty of Science

Contact Details

Email garth.tarr@newcastle.edu.au
Phone (02) 4921 6741
Fax (02) 4921 6898
Links Twitter
Personal webpage

Office

Room V232
Building Mathematics Building
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
Edit