The segment of the text goes like this: "[...]the predicted calving date was within 0.9 days of the actual calving date when ultrasound was undertaken [...]"

I have to translate this and I can't figure if the predicted (via ultrasound) date happened 0,9 days earlier or later than the actual date.

  • This question sounds similar to a lot of previous questions we've had on the meaning of "within x days," except that this one appears to be asking about within in the sense of "plus or minus x days [from a reference point date]" rather than "before the expiration of x days." so I think it may not be a duplicate. – Sven Yargs Sep 22 '16 at 19:55

You can't tell if the prediction was early or late. It's a measure of overall accuracy, ±0.9 days.

Early                    Late
   -1         0         1

The prediction was within the bracketed range.

  • Ahh. That actually makes things easier. Thank you! – Maah Tourinho Sep 22 '16 at 19:47

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