Question: Two independent methods of forecasting based on judgment and experience have been prepared each month for the past 10 months. The forecasts and actual sales

Two independent methods of forecasting based on judgment and experience have been prepared each month for the past 10 months. The forecasts and actual sales are as follows:

Month	Sales	Forecast 1	Forecast 2
1	771	768	769
2	790	789	792
3	794	792	792
4	776	775	775
5	772	771	771
6	770	771	770
7	761	764	765
8	774	772	773
9	792	793	795
10	794	792	790

a. Compute a tracking signal for the 10th month for each forecast using the cumulative error for months 1 to 10. Use action limits of 4. Is there bias present? (Do not round your intermediate calculations. Round your answers to 2 decimal places. Negative amounts should be indicated by a minus sign.)

Forecast	Tracking Signal	Bias
Method 1		(Click to select) Present Not present
Method 2		(Click to select) Not present Present

b. Compute 2s control limits for each forecast. (Do not round your intermediate calculations. Round your answers to 2 decimal places.)

Forecast	Control Limits
Method 1
Method 2

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