The general Census Help & feedback contact page contains contact information for inquiries and feedback. Documentation from past and present releases of SEIFA contain vast amounts of information. Some common questions are also answered below. Using and interpreting SEIFA What is an index score? What is a rank? What is a decile? What is a percentile? Why do some areas not receive an index score? Which index do I use? Why does the same area have a different rank for each index? Can I compare SEIFA across time? Why do SA1s in different deciles have the same score? Setting up your analysis How do I match SEIFA to my data? For how many years are SEIFA indexes available? What information was used to construct SEIFA?

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