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Automotive

Self-priming Dispenser Fuel Hand Pump Hand Crank Aluminum Alloy Rotary Gas Oil

Automotive3.9· 32 Amazon ratings

Bias-adjusted across 32 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Automotive.

19.8%
Percentile · Global
19.4%
Percentile · Cohort
Automotive
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Self-priming Dispenser Fuel Hand Pump Hand Crank Aluminum Alloy Rotary Gas Oil

How the score was built

Amazon ratings
32

used for the Bayesian percentile

Raw star average
3.9 / 5

unadjusted Amazon mean

Bayesian avg
4.20

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 · Automotive

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