brifly explain about the absolute error?
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No, the absolute error cannot be negative. Absolute error is defined as the absolute value of the difference between the measured value and the true value, which ensures that it is always non-negative. It is calculated as |measured value - true value|, and since absolute values are always positive or zero, the absolute error itself will also never be negative.
55.3
The mean absolute percent prediction error (MAPE), .The summation ignores observations where yt = 0.
If the true value is t and the calculated or measured value is v then absolute error = |v - t|, the absolute value of (v - t).If v >= t then the absolute value is v - tif v
The absolute error can be as large as 1.5