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Sports & Outdoors

Gregory Mountain Products Z 30 Backpack

Sports & Outdoors4.4· 146 Amazon ratings

Bias-adjusted across 146 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Sports & Outdoors.

64.1%
Percentile · Global
56.9%
Percentile · Cohort
Sports & Outdoors
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Gregory Mountain Products Z 30 Backpack

How the score was built

Amazon ratings
146

used for the Bayesian percentile

Raw star average
4.4 / 5

unadjusted Amazon mean

Bayesian avg
4.36

raw rating shrunk to the category prior

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Same category · Sports & Outdoors

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