time series definition

time series

Values taken by a variable over time (such as daily sales revenue, weekly orders, monthly overheads, yearly income) and tabulated or plotted as chronologically ordered numbers or data points. To yield valid statistical inferences, these values must be repeatedly measured, often over a four to five year period. Time series consist of four components: (1) Seasonal variations that repeat over a specific period such as a day, week, month, season, etc., (2) Trend variations that move up or down in a reasonably predictable pattern, (3) Cyclical variations that correspond with business or economic 'boom-bust' cycles or follow their own peculiar cycles, and (4) Random variations that do not fall under any of the above three classifications.

time series is in the Statistics, Mathematics, & Analysis subject.

time series appears in the definitions of the following terms: interpolation, Box-Jenkins models, smoothing, autoregressive moving average (ARMA) model, Box Jenkins (B-J) models, autoregressive integrated moving average (ARIMA) model and serial correlation

time series appears in these other terms: time series forecast, time series analysis (TSA), time series data, autocorrelated time series

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