Book
Making Your Own Bush Knife: A Beginner's Guide for the Backyard Knifemaker (Fox Chapel Publishing) Create a Practical Tool with a Small Backyard Metalsmithing Forge, Instructions from Steel to Handle
Two parallel scores from 3 calibrated reviewers and 3 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.
Where this book sits
Z-normalized percentile · 5,285 ranked books
| Mean reviewer z-score | -0.447 |
|---|---|
| Calibrated raw-mean rating | 4.33 /5 |
| Broad raw-mean rating | 4.33 /5 |
| 90% CI-floor (z) | -1.397 |
| Reviewers (calibrated / broad) | 3 / 3 |
Summary
Making Your Own Bush Knife: A Beginner's Guide for the Backyard Knifemaker (Fox Chapel Publishing) Create a Practical Tool with a Small Backyard Metalsmithing Forge, Instructions from Steel to Handle sits at the 16th 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 14; 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
3 reviewers with rating variance re-centered onto a personal z-scale.
Mean z = -0.447. Broad raw mean = 4.33/5.
90% CI-floor = -1.397. Thin samples penalized.
Global 16.4. Z-track and raw-track ranked separately.
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