Arts, Crafts & Sewing
Cool Stationery Set Feather Dip Pen Quill Writing Pen(Black)
Bias-adjusted across 5,000 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Arts, Crafts & Sewing.
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How the score was built
- Amazon ratings
- 5,000
- Raw star average
- 4.4 / 5
- Bayesian avg
- 4.40
- Reviewer-graph z
- 0.707
used for the Bayesian percentile
unadjusted Amazon mean
raw rating shrunk to the category prior
bias-corrected vs. each reviewer's baseline (0 qualifying)
Buy it: View on Amazon →
Same category · Arts, Crafts & Sewing
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