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Applied Statistical Analysis

Data can be confusing since it rarely records anything without some form of ambiguity, uncertainty or "error".  Statistics is the theory and practice of most effectively extracting the real information from such data.  It not only extracts this information, but does so with a clear statement on how precise any inferences can be.

The statistical methods that revolutionised science and industry in the twentieth century are continually being developed, especially in computation and large data sets.  Data Analysis Australia brings together these methods to solve clients' problems.  Our depth of statistical knowledge and our mathematical expertise means that we can apply the right set of tools for every problem either familiar or unique.

Data Analysis Australia statisticians employ a range of exploratory and analytical statistical techniques including:

  • Experimental design, ensuring information is collected as efficiently as possible; 
  • Regression modelling, using classical linear models as well as modern extensions such as generalised additive models and structured equation models; 
  • Multivariate methods such as factor analysis, conjoint analysis and perceptual mapping; 
  • Cluster analysis and multi-dimensional scaling to understand complex datasets with many variables; and 
  • Time series and longitudinal methods that can handle data with difficult correlations over time.

Industry Case Studies

Environment - Analysis of Woylie Population
Medical - Rare Cases in Large Data Sets
Water Corporation - Advertising Effectiveness
Mining - Efficiency of Electrowinning Circuit
Western Power - Evaluating the Perth Solar Cities Program
Financial Literacy in Australia Segmentation Analysis
Mining - Understanding Environmental Impacts
Horizon Power - Electricity Profiles

Analytical Ideas

Where, when and from whom should you buy your fuel?

Fuel costs are significant for Australian households. Simple aggregation indicates that fuel prices in WA undergo a weekly price cycle – however this does not provide the whole story.  Averaging can smooth over important variation and details.  Statisticians look to understand variation rather than simply regarding it as a nuisance.  Segmentation can assist with this.

In this article, Data Analysis Australia segments fuel prices (provided by the WA Fuel Watch website) to understand price variations and provide insights and segments driven by time, location, brand and fuel type.

Statistics and Law

What profession involves gathering evidence, determining what it might collectively mean and then making decisions based on that evidence according to both logic and an established code? Both the legal and statistical professions answer to this description. 

This article gives Dr John Henstridge's opinion on how statisticians and lawyers can work together.