一些预测程序总计错误的绝对值而且可能报告这总数，或藉着预测尝试的数字分开它生产平均的预测错误。
Some forecasting procedures sum the absolute values of the errors and may report this sum, or divide it by the number of forecast attempts to produce the average forecast error.
一些预测程序总计错误的绝对值而且可能报告这总数，或藉着预测尝试的数字分开它生产平均的预测错误。
Some forecasting procedures sum the absolute values of the errors and may report this sum, or divide it by the number of forecast attempts to produce the average forecast error.
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