Question: the answer disayed is correct. i just need help understanding process. i understand everything except how to calculate Mean Absolute Deviation (MAD) and Tarcking Signal
the answer disayed is correct. i just need help understanding process.
i understand everything except how to calculate Mean Absolute Deviation (MAD) and Tarcking Signal (TS).
please show calculation for those two colums

A manager uses this equation to predict demand for landscaping services: Ft=15+4t. Over the past eight periods, demand has been as follows: Click here for the Excel Data File Compute the tracking signals for Periods 1-8. (Negative values should be indicated by a minus sign. Round your intermediate calculations and final answers to 3 decimal places.) Explanation
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