Question: The Excel file CD Interest Rates provides annual average interest rates on 6 month certificate of deposits. Compare the Holt Winters additive and multiplicative models

The Excel file CD Interest Rates provides annual average interest rates on 6 month certificate of deposits. Compare the Holt Winters additive and multiplicative models using XL Miner with the default parameters and a season of 6 years. Why does the multiplicative model provide better results?

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