Book
The Classic Tale of Peter Rabbit Board Book (The Revised Edition): Illustrated by acclaimed artist, Charles Santore (The Classic Edition)
Two parallel scores from 5 calibrated reviewers and 5 raw-average reviewers.
Z-normalized corrects for reviewer bias (every reviewer re-centered onto their personal scale). Raw average uses simple mean across the broader pool including stddev=0 reviewers. The 21-point gap is the rating-inflation signature for this title — discriminating reviewers liked it more than the casual crowd.
Where this book sits
Z-normalized percentile · 5,285 ranked books
| Mean reviewer z-score | -0.218 |
|---|---|
| Calibrated raw-mean rating | 3.80 /5 |
| Broad raw-mean rating | 3.80 /5 |
| 90% CI-floor (z) | -0.954 |
| Reviewers (calibrated / broad) | 5 / 5 |
Summary
The Classic Tale of Peter Rabbit Board Book (The Revised Edition): Illustrated by acclaimed artist, Charles Santore (The Classic Edition) sits at the 25th z-normalized percentile across 5,285ranked books. The z-percentile differs from a raw star average because Rankquant subtracts each reviewer's personal baseline before aggregating — so a reader who rates everything 5 stars carries less weight than one who rates discerningly. Raw-average percentile is 4; the gap between the two measures how much bias-correction changes this title's standing. How percentiles are computed.
Pipeline applied to this title
The math, in this order
5 reviewers with rating variance re-centered onto a personal z-scale.
Mean z = -0.218. Broad raw mean = 3.80/5.
90% CI-floor = -0.954. Thin samples penalized.
Global 25.3. Z-track and raw-track ranked separately.
Similar percentile
