Chapter 5 - Time Series

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Created by
Amber

Cards (3)

  • Time series graphs
    a line graph with time plotted on the x - axis
    used to spot trends - usually going up or down or fluctuating
  • Trend lines
    shows the general trend of the data.
    may be rising, falling or level trend
  • seasonal variations
    a general trend - shown by trend line
    seasonal variations - a pattern that repeats at a specific point every cycle
    seasonal variation = actual value - trend value
    estimated mean seasonal variation = mean of all seasonal variationis for that season
    predicted value = trend line value (from graph) + EMSV