1. Consider the following data. Two different methods have been used to provide a forecast.

Week	Actual	Method 1 Forecast	Method 2 Forecast
1	18
2	13	18	18
3	16	13	16
4	11	16	16
5	17	11	15
6	14	17	15
7		14	15

1. For Method 1, compute the following: i. MAE

   ii. RMSE iii. MAPE

2. For Method 2, compute the following: i. MAE

   ii. RMSE iii. MAPE

3. Which method appears to provide the more accurate forecasts for the historical data? Explain.

2. For each of the following common patterns found in time series, identify a reasonable example from the real-world that would likely exhibit this pattern.

a. Horizontal b. Trend c. Seasonality d. Cyclical