A company has the information shown in the chart below regarding its forecast performance in the past three periods. 
What is the mean absolute deviation (MAD) ?
Definitions:
Strategy Maps
Visual tools used to communicate the company's strategic objectives and the actions needed to achieve them.
Customer
An individual or business that purchases goods or services produced by a company.
Performance Perspectives
Various angles or aspects from which organizational performance is analyzed and measured, such as financial, customer, operational, and learning and growth perspectives.
Internal Processes
Systems, procedures, and workflows within an organization designed to support its operations, improve efficiency, and meet business objectives.
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