The Postgraduate Diploma in Science (PGDipSci) is a one-year programme which builds on an undergraduate science degree. The diploma encompasses both papers and a research topic, and can be taken full-time or part-time. It provides entry to the Master of Science (MSc) degree by thesis only. Statistics as a field of study is concerned with the collection, analysis and interpretation of numerical data. The main emphasis is on the role of random variation in observations that are made, which is why statistical theory is built on the concepts of probability. Although the study of statistics in any depth requires some proficiency in algebra and calculus, it is not just another branch of mathematics. The use of statistical methods requires skills in problem formulation, computing and the assessment of evidence that are not always closely related to mathematical ability. Furthermore, a key ingredient for being a successful statistician is the ability to communicate complex ideas to other people in written and verbal reports. Statistics can be studied at all undergraduate levels at the University of Otago. Many students take a first year Statistics paper as a prerequisite for their main subject of interest, or just because it is generally useful to have some knowledge of basic quantitative methods. Often these students then continue the subject with papers at 200-level and 300-level while majoring in disciplines like Botany, Ecology, Economics, Finance, Geography, Marketing Management, Psychology or Zoology. Other students study Statistics as their major subject because they: are looking for a practical and useful application of their mathematical abilities, with good employment prospects would like to work with researchers, in a wide range or disciplines, in solving important problems want a job which involves them in contributing to policy or management decisions for government or private industry have a concern for social or environmental issues and want to use their skills in biological, environmental or medical research. Papers STAT 490 Dissertation Four 400-level STAT papers