Shown above is the average error in two-year real economic growth forecasts by the Congressional Budget Office.

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In rotating constantly through all possible vertical positions, it creates a single average error for all vertical positions.

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The new model does much better, with an average error of 43%.

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For example, using data on searches for trucks and SUVs to predict the monthly sales of motor vehicles reduces the average error by up to 18% compared with the predictions from a model that did not incorporate the search data.

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The average tracking error of ETFs is 59 basis points, well under 1%, Morgan Stanley found.

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Although the MIT study does not give margins of error, the 2.6 minute average difference in waiting time surely falls within a reasonable margin of error.

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We picked the 10 highest whose margin of error did not exceed the average.

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Illinois's error rate was fractionally lower (66%) than average.

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Remarkably, the nurses and doctors were observed to make an error in just one per cent of these actions but that still amounted to an average of two errors a day with every patient.

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