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Seasonality in Data and How to Adjust

Seasonality in Data and How to Adjust

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Sample Sliding Spans - Seasonal Factors

Month Span 1 Span 2 Span 3 Max % Diff.
1990-11 109.7 108.8 108.2 1.4
1990-12 113.0 111.5 110.3 2.0
1991-01 74.6 73.9 72.9 2.3
1991-02 84.0 80.7 76.1 10.3