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Mr Ebenezer Afrifa-Yamoah

Casual Academic

Staff Member Details
Telephone: +61 8 0424559378
Campus: Joondalup  
Room: JO19.384  

Eben is a sessional academic teaching units in Statistics and Mathematics and a PhD candidate with the School of Science.

Current Teaching

  • MAT3110 Applied Multivariate Statistics (Unit Coordination and lecturing)
  • MAT2110 Applied Statistics (Unit Coordination and lecturing)
  • MAT1114 Introductory Statistics (Tutoring)
  • CYB6009 Data Analysis and Visualisation (Facilitating)
  • MAT5212 Biostatistics (Tutoring)
  • MAT2440 Time Series Forecasting (Lecturing)
  • MAT2107 Statistical Research Methods (Lecturing)

Overview of thesis

Imputations, Modelling and Optimal Sampling Design for Remote Camera Surveys

Aspects of fisheries management require effective monitoring of recreational fisheries to ensure sustainability. Unlike commercial fishers, recreational fishers are not required to report on catches and effort. The use of probability-based survey methods that expand estimates of catch and effort to population totals is common. Therefore, there is the need for independent validation and corroboration of recreational survey results.  Remote camera surveys are useful tool to validate boating activity (defined in launches or retrievals) and corroborate recreational fishing effort obtained from other studies, because they provide the opportunity for monitoring boating activities that may represent an extremely large sample or even a census of boating activities. However, there are challenges in the use of the remote cameras that need to be resolved. These include missing observations, the effect of environmental and climatic conditions on estimates of boating activities and the high cost of data interpretation. In this study, boat launches and retrievals will be analysed from an extensive network of boat ramp cameras along the Western Australian coastline, including metropolitan and remote areas. The aims of the study are to: develop an imputation scheme that incorporates environmental and climatic conditions to “fill in” missing observations due to camera outages;  build time series and regression models to understand the trends and patterns in boating activities; and design an optimal sampling scheme for the camera records to reduce data interpretation cost.


  • Master of Science (Mathematical Sciences), Norwegian University of Science and Technology, Norway (2014-2016)
  • Master of Philosophy (Mathematical Statistics), Kwame Nkrumah University of Science and Technology, Ghana (2013-2016)
  • Master of Education (Mathematics), University of Education, Winneba, Ghana (2012-2014)
  • Bachelor of Science (Hons) (Statistics) (First Class), University of Cape Coast, Ghana (2009-2011)
  • Higher National Diploma (Statistics) (First Class), Kumasi Polytechnic, Ghana (2005-2008)

Professional Membership

  • Statistical Society of Australia (Student member)


Research Interests

  • Applied Statistics
  • Statistical Consulting
  • Time Series forecasting
  • Statistical modelling

Other work

  • Mathematics Teacher, Ghana Education Service – (2011-2014)
  • Teaching Assistant (Stochastic Processes), KNUST, Accra City Campus, Ghana – (2013-2014)
  • National Service Person, Kumasi Polytechnic, Ghana – (2008-2009)
  • 2017 – Western Australia Department of Fisheries Research Agreement Scholarship, Edith Cowan University, Perth, Australia.
  • 2014 – Quota Scheme Scholarship, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.

Scholarships and Awards

  • 2017 – Western Australia Department of Fisheries Research Agreement Scholarship, Edith Cowan University, Perth, Australia.
  • 2014 – Quota Scheme Scholarship, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.

Recent Publications (within the last five years)

Journal Articles

  • Afrifa-Yamoah, E†., Mueller, U. A., Taylor, S. M. and Fisher, A. J. (2020). Missing data imputation of high-resolution temporal climate time series data. Meteorological Applications, 1-18.
  • Afrifa-Yamoah, E.†., Okyere, G.A., Asare-Bediako, M., Bashiru I.I. Saeed (2016) A Robust Procedure for the Fit of One-way ANOVA Model under Adaptation on the Observed Samples, Journal of Mathematics and Statistical Sciences, Vol. 2016, 534-553.
  • Afrifa-Yamoah E.†, P. O. Cofie, Bashiru I. I. Saeed, Azumah Karim, Adu Paul (2016), Measuring and Relating Senior High School Students’ Achievement Motivation towards Mathematics Lessons, Education, 6(4), 89-95.
  • Afrifa-Yamoah E. (2016), Achievement Motivation as a Function of Participation, Strive, Willingness to Work and Maintaining Work: Application of Structural Equation Modelling (SEM), International Journal of Psychology and Behavioral Sciences, 6(3), 133-138.
  • Amina Abubakari, Azumah Karim*, Bashiru I. I. Saeed and Afrifa-Yamoah E. (2016), Trend analysis of malaria cases in Ghana from 1985 – 2008, Sky Journal of Medicine and Medical Sciences, 4(4), 028 – 033.
  • Afrifa-Yamoah E†., Bashiru I. I. Saeed, Azumah Karim (2016), SARIMA Modelling and Forecasting of Monthly Rainfall in the Brong Ahafo Region of Ghana, World Environment, 6(1), 1-9.
  • Afrifa-Yamoah E. (2015), Application of ARIMA Models in Forecasting Monthly Average Surface Temperature of Brong Ahafo Region of Ghana, International Journal of Statistics and Applications, 5(5), 237-246.

Journal Articles – In press, preprint or under review

  • Kalpana, P.† and Afrifa-Yamoah, E. An Empirical Study on Rainfall Patterns of Monsoon Season in the North-West India Using Time Series Models (In press – Journal of Statistics & Management Systems)
  • Eric Adua†, Ebenezer Afrifa-Yamoah†, Kwasi Frimpong, Esther Adama, Shantha Karthegesu, Enoch Odame Anto, Emmanuel Aboagye, Yuxiang Yan, Youxin Wang, Xuerui Tan, Wei Wang. Construct validity of the suboptimal health status questionnaire in the context of a Ghanaian population. (Preprint – Health and Quality Life Outcomes)
  • Afrifa-Yamoah, E†., Taylor, S. M. and Fisher, A. J., Mueller, U. A. Multiple imputation modelling with climatic and temporal predictors enables accurate imputation of time-lapse camera missing data in recreational fishing surveys (Under review – ICES Journal of Marine Science)
  • Adama, E†; Arabiat, D; Foster, MJ; Afrifa-Yamoah, E; Runion, K; Vithiatharan, R; Lin, A. The psychosocial impact of rare diseases among children and adolescents attending mainstream schools in Western Australia (Under review – Journal of School Nursing)
  • Diana H. Arabiat†; Lisa Whitehead; Buthina Abu Sheikh; Ebenezer Afrifa-Yamoah. Confirmatory Factor Analysis and Reliability of the Diabetes Treatment Satisfaction Questionnaire (DTSQ) for Arabic Speaking Patients with Type II Diabetes (Under review – Journal of Multidisciplinary Healthcare)
  • Nunfam, VF†; Afrifa-Yamoah, E†; Akanganngang, JA. The nexus of personality traits, entrepreneurship curriculum and intention among Ghanaian tertiary students: an application of mediated-moderation model (Under review - Entrepreneurship Education and Pedagogy)

Conference Publications/ Presentations

  • Afrifa-Yamoah, E. When less is more: a cost-accuracy trade-off for remote camera surveys. Oral presentation at the Recreational Fishing Surveys Workshop 2019, Perth, Australia.
  • Afrifa-Yamoah, E.†, Mueller, U. A., Fisher, A. J. and Taylor, S. M. (2019). Fixed versus Random effects models: An application in building imputation models for missing data in remote camera surveys. In the proceedings of the 34th International Workshop on Statistical Modelling (IWSM), Guimarães, Portugal.
  • Afrifa-Yamoah. E.  Missing data imputation of high-resolution temporal climate time series data. Oral presentation at Young Statisticians Workshop 2018, Perth, Australia.
  • Afrifa-Yamoah E. and Okyere, G.A., A Robust Procedure for the Fit of One-way Analysis of Variance (ANOVA) models with Uncorrelated Errors, Poster presentation at AMISTAT 2015 Conference, Prague, Czech Republic.


Associate Professor Ute Mueller (ECU)
Dr Stephen M. Taylor (DPIRD)


PhD candidate
School of Science
Mobile: 0424559378


  • Master Of Science, Norway, 2016.

Recent Publications (within the last five years)

Journal Articles

  • Afrifa-Yamoah, E., Taylor, SM., Mueller, U., (2021), Trade-off assessments between reading cost and accuracy measures for digital camera monitoring of recreational boating effort. Fisheries Research, 233(1), 105757, DOI:
  • Arabiat, D., Whitehead, L., Abu Sheikh, B., Afrifa-Yamoah, E., (2020), Confirmatory factor analysis and reliability of the diabetes treatment satisfaction questionnaire (DTSQ) for Arabic speaking patients with type II diabetes. Journal of Multidisciplinary Healthcare, 13(2020), 953-961, DOI: 10.2147/JMDH.S266913.
  • Afrifa-Yamoah, E., Taylor, SM., Fisher, A., Mueller, U., (2020), Imputation of missing data from time-lapse cameras used in recreational fishing surveys. ICES Journal of Marine Science: journal du conseil, 1(1), 1-11, DOI: 10.1093/icesjms/fsaa180.
  • Afrifa-Yamoah, E., Mueller, U., Taylor, SM., Fisher, A., (2020), Missing data imputation of high-resolution temporal climate time series data. Meteorological Applications, 27(1), Article number e1873, DOI: 10.1002/met.1873.
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