![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/0.2BC!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Data
Includes: Definitions, Example
Data are observations or facts that can become information or knowledge |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/0.3EF0!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Index
Includes: Definition:, What do indexes tell you?, How can we calculate an Index?, When is an index not appropriate?
An Index is a number used to show the variation in some quantity over time. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/0.7A64!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Mean
Includes: Definition , Here's another way of looking at it!, How do you calculate the mean?, When is the Mean not a useful measure?
The mean is a summary number that measures the midpoint of a dataset. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/1.1298!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Measures of Error and Spread
Includes: Definitions, Calculations, Using Standard Deviation, Standard Error and Relative Standard Error
Standard deviation measures the scatter in a group of observations |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/1.4DD2!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Median
Includes: Definition, What can the Median tell you?, How do you calculate a Median?, When is the Median not a good measure of central tendency?
The median is the middle score that seperates the lower half of a dataset from the higher half. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/2.3B90!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Mode
Includes: Definition , What does the mode tell you?, How do you calculate a mode?, When is the mode not a good measure of central tendency?
The mode is the most commonly observed data item in the data set |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/3.3B42!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Percentage
Includes: Definition, What does Percentage tell you?, How do you calculate the Percentage?, Benefits and downfalls of Percentage
Percentage is a term used to express a number as a fraction of 100. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/4.3DB8!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Population, Sample and Estimate
Includes: Definitions, What do populations and samples tell us?, Which to use in a survey - Population or Sample?
A population is any entire group with at least one common characteristic. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/5.3AC8!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Probability
Includes: Definition, What can Probability tell you?, How do you calculate Probability?, Benefits and downfalls of Probability
Probability refers to the liklihood (or chance) of an event occuring. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/6.3998!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Quantitative and Qualitative
Includes: Definitions, Example
Qualitative data describes an objects attributes that cannot be measured with numbers. Quantitative data is data characterised by numbers. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/7.3C0C!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Range
Includes: Definition, What does the Range tell you?, How is the Range calculated?, Benefits and downfalls of using the Range
Range represents the distance between the highest and lowest values of a data set. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/8.3B22!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Rate
Includes: Definition:, What does Rate tell you?, How is the Rate calculated?
Rate is an expression of ratio; it represents the relationship between two numbers. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/9.3B7A!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Ratio
Includes: Definition, What does Ratio tell you?, How do you calculate the Ratio?
Ratio is a way of concisely showing the relationship of one quality relative to another. |
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![](/ausstats/abs@.nsf/0/32cdcd264fe60642ca2574740015c759/Body/10.3B04!OpenElement&FieldElemFormat=gif) | ![](/icons/ecblank.gif) | Time Series
Includes: Definition- Time series, Why are Time-series Created?, Definition- Seasonally Adjusted Time-series, Why are Time-series Seasonally Adjusted?, Definition- Trend Time-series, Why are Trend Time-series Created?, Take care when using Time series
A time series is a collection of observations obtained through repeated measurements through time. |
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