# Australian Bureau of Statistics

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 Understanding statistics

Statistical Language helps you to understand a range of statistical concepts and terms with simple explanations.

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 What are Data? - Data unit - Data item (variable) - Observation - Dataset
 Quantitative and Qualitative Data - Quantitative data - Qualitative data
 What are Variables? - Variable (data item) - Numeric - Continuous - Discrete - Categorical - Ordinal - Nominal
 What is a Population? - Population
 Census and Sample - Census - Sample - Random (probability) sample - Non-random (non-probability) sample
 Data Sources - Direct/Primary data - Survey - Indirect/Secondary data - Administrative data
 Describing Frequencies - Absolute frequency - Relative frequency - Ratio - Rate - Proportion
 Frequency Distribution - Frequency distribution - Histogram - Bar chart
 Measures of Shape - Measures of shape - Normal distribution - Skewness
 Measures of Central Tendency - Mode - Median - Mean - Outlier
 Measures of Spread - Range - Quartiles - Interquartile range - Variance - Standard deviation
 Types of Error - Sampling error - Non-sampling error
 Measures of Error - Standard error (SE) - Relative error (RE) - Confidence interval
 What are Statistics? - Descriptive (summary) statistics - Inferential statistics
 What are Standards? - Statistical standard - Classification
 Data Visualisation - Static - Dynamic - Interactive
 Time Series Data - Original time series - Seasonally adjusted time series - Trend series
 Estimate and Projection - Estimate - Projection
 Correlation and Causation - Correlation - Causation (Causality)
 Confidentiality - Confidentiality