Dr Lienki Viljoen

Senior Lecturer

University of Stellenbosch

Private Bag X1, Matieland

7602, South Africa

Tel:         +(27) 21 808 3241

Fax:        +(27) 21 808 3830

e-mail:     lienki@sun.ac.za

Obtained a Ph.D in Statistics 1999 at the Potchefstroom University for Christian Higher Education with Promoter Prof J.H. Venter.  The title: “A computer intensive approach to identify multiple outliers.”

Present Teaching Subjects

Mathematical Statistics 364

Applied Time Series Analysis B (Honours)

Present Research Interests

Time Series

Publications in Journals

• Venter J.H. and Viljoen H. 1999. Identifying multiple discordant observations:  a computer intensive approach.  Computational statistics & Data Analysis. 29, 261-273.

• Viljoen H. and Venter J.H. 2002 Identifying Multivariate discordant observations: a computer intensive approach. Computational statistics & Data Analysis. 40, 159-172.

• H. Viljoen and D.G. Nel. Common singular spectrum analysis of several time series. Journal of Statistical Planning and Inference, 140 (2010) 260-267.

International Conferences

• J.H. Venter and H. Viljoen (1997) “A computer intensive approach to identify multiple outliers.”  International Statistical Institute  Istanbul,Turkey.

• H. Viljoen and J.H. Venter (1999) “A computer intensive approach to identify multivariate outliers.” International Statistical Institute.  Helsinki, Finland.

• H. Viljoen, D.G. Nel and J de Klerk. (2006) On common singular spectrum analysis of time series. Royal Statistical Society. Belfast, Northern Ireland.

• H Viljoen and D.G. Nel.(2009) Common singular spectrum analysis of several time series. International Conference on Robust Statistics (ICORS), Parma Italy.

National Conferences (South African)

• H. Viljoen  and R.Schall (1994). “Statistical analysis of Dose-proportionality studies.”  Annual Conference of the South African Statistical Association.  Kruger National Park.

• J.H. Venter and H. Viljoen (1997) “A computer intensive approach to identify multiple outliers.”  Annual Conference of the South African Statistical Association. Dikhololo.

• H.S. Steyn (jr) and H. Viljoen (1999) “Significant differences between two population means.” Annual Conference of the South African Statistical Association. University of Natal.

• H.S. Steyn (jr) and H. Viljoen (2000) “Effectsizes when comparing more than two population means.”  Annual Conference of the South African Statistical Association. University of the Witwatersrand.

• H.S. Steyn (jr) and H. Viljoen (2001) “Effectsizes when comparing mean vectors.”  Annual Conference of the South African Statistical Association.  Goudini Spa.

• H Viljoen and HS Steyn (jr) (2004):  “Effect sizes to determine practically significant differences of mean vectors:  an introduction”. Annual Conference of the South African Statistical Association. Bloemfontein

• HS Steyn (jr) and H Viljoen (2004):  “Effect sizes to determine practically significant differences of mean vectors:  estimation and properties”.  Annual Conference of the South African Statistical Association.  Bloemfontein

• H. Viljoen, D.G. Nel and J de Klerk. (2006) “On common singular spectrum analysis of time series”. Annual Conference of the South African Statistical Association.  Stellenbosch

Past Work Experience

Societies and Committees

Member of the South-African Statistical Association.

Back to Staff