Question: A forecasting method has the following five forecasting errors: 3 -5 1 9 -1 Please calculate the tracking signal (TS) value of this forecasting method.

A forecasting method has the following five forecasting errors:

3 -5 1 9 -1

Please calculate the tracking signal (TS) value of this forecasting method.

Numbers only, keep 3-decimal if not exact round-up or down is ok.

I got 1.123 but the answer is 1.842. Please explain so I understand where I went wrong.

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