# NAB Normalized Scores

**URL:** <https://discourse.numenta.org/t/nab-normalized-scores/8509>\
**Category:** NAB\
**Tags:** anomaly-detection, anomaly-likelihood\
**Created:** [April 28, 2021, 6:50pm UTC](https://discourse.numenta.org/t/nab-normalized-scores/8509 "2021-04-28T18:50:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![pmoriano](https://avatars.discourse-cdn.com/v4/letter/p/8edcca/32.png) [@pmoriano](https://discourse.numenta.org/u/pmoriano)\
**Post date:** [April 28, 2021, 6:50pm UTC](https://discourse.numenta.org/t/nab-normalized-scores/8509/1 "2021-04-28T18:50:16Z")

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Hello,

I am having trouble to interpret the normalized NAB score (Eq. (4) in the conference paper). The result is supposed to be in the range [0, 1], but this depends on how many false positives you get, i.e., if you get too many the score of the detector will be negative and potentially Eq. (4) would produce a negative number.

I wonder if this interpretation is correct. Any feedback appreciated.

Thank you.