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GCSE Mathematics · key term
Data consisting of observations recorded in time order.
Used by AQA, Edexcel and OCR
Specification S2 · Paper 1, Paper 2, Paper 3
Data recorded in chronological order, usually at regular time intervals.
Revise: Charts for Discrete and Time Series DataA time series records a variable at successive times, such as a shop's weekly sales or a town's monthly rainfall. A time series table should place the times in chronological order and give the corresponding value, with its unit, for each time.
Specification S2 · Paper 1, Paper 2, Paper 3
Data made up of observations of the same quantity recorded at different times.
Revise: Charts for Discrete and Time Series DataData collected in time order form a time series. Examples include a shop's sales each month or a town's temperature at midday each day. Here, the order of the observations matters: rearranging the values would destroy information about change over time.
Specification 12.02a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
A set of measurements recorded in time order.
Revise: Comparative Bar Charts and Time Series DataRead a time series at two levels. First, look for its overall trend: is the quantity generally increasing, decreasing or staying roughly steady? Then look for shorter-term patterns.
Check the data type before drawing: use separate vertical lines for ungrouped discrete numerical data, but join successive points on a time series line graph.
When describing a time series, support statements with the graph: identify the period and quote relevant values where possible.
Do not claim that every rise or fall will continue. A time series displays past data; any prediction based on its trend is an estimate.
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