Refer to the data in problem 22. a. Compute a tracking signal for the 10th month for each forecast using the

QUESTION:

Refer to the data in problem 22.

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? Explain.

b. Compute 2s control limits for each forecast.


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