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Office & Industrial

Uni-ball E-Knock Eraser - Black Body

Office & Industrial4.6· 4,628 Amazon ratings

Bias-adjusted across 4,628 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Office & Industrial.

92.5%
Percentile · Global
86.9%
Percentile · Cohort
Office & Industrial
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Uni-ball E-Knock Eraser - Black Body

How the score was built

Amazon ratings
4,628

used for the Bayesian percentile

Raw star average
4.6 / 5

unadjusted Amazon mean

Bayesian avg
4.59

raw rating shrunk to the category prior

Reviewer-graph z
-0.707

bias-corrected vs. each reviewer's baseline (0 qualifying)

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Same category · Office & Industrial

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