Cyclical component (for time-series data)

Long-term variations in time-series data that repeat in a reasonably systematic way over time. The cyclical component can often be represented by a wave-shaped curve, which represents alternating periods of expansion and contraction. The successive waves of the curve may have different periods.

Cyclical components are difficult to analyse, and at level 8, cyclical components can be described along with the trend.

See: time-series data

Curriculum achievement objectives reference

Statistical investigation: Level 8

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