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values obtained in step(1). In other words, in a multiplicative time-series model, we get (Original data values) / (Trend values) × 100 = ( × × × ) / ( × ) × 100 = ( × ) × 100.
This implies that the ratio-to-moving average represents the seasonal and irregular components.
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# Arrange these percentages according to months or quarter of given years. Find the averages over all months or quarters of the given years.
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# If the sum of these indices is not 1200

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