Health, Household & Baby
Medela Valves & Membranes For All Medela Breastpumps
Bias-adjusted across 195 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Health, Household & Baby.
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How the score was built
- Amazon ratings
- 195
- Raw star average
- 4.0 / 5
- Bayesian avg
- 4.10
used for the Bayesian percentile
unadjusted Amazon mean
raw rating shrunk to the category prior
Buy it: View on Amazon →
Same category · Health, Household & Baby
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