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1332.0.55.002 - Statistical Language!, 2008  
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 27/06/2008  First Issue
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Includes: Definitions, Example
Data are observations or facts that can become information or knowledge
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.
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.
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
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.
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
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.
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.
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.
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.
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.
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.
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.
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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