1. Use double exponential smoothing method to forecast sales for months 2 to 12, assuming and set .

What is the forecast for the 10^th month?

2. Compute the Mean Absolute Deviation (MAD) of the forecasts for months 2 to 12 from the double exponential smoothing method in Question 1

3. Compute the Mean Square Error (MSE) of the forecasts for months 2 to 12 from the double exponential smoothing method in Question 1

CozyforU is a manufacturer of down jackets. Its director of sales wants to develop seasonal forecast of sales that accounts for any trend or seasonality. The following table shows sales (in millions of units) of one product model for the past 16 seasons. Season 2018 2019 2020 2021 Winter 97.15 96.25 96.10 95.35 Spring 56.35 55.90 56.05 57.25 Summer 35.05 36.10 35.35 34.90 Fall 67.90 70.00 67.60 67.45 CozyforU is a manufacturer of down jackets. Its director of sales wants to develop seasonal forecast of sales that accounts for any trend or seasonality. The following table shows sales (in millions of units) of one product model for the past 16 seasons. Season 2018 2019 2020 2021 Winter 97.15 96.25 96.10 95.35 Spring 56.35 55.90 56.05 57.25 Summer 35.05 36.10 35.35 34.90 Fall 67.90 70.00 67.60 67.45