Film · 1974 · Films · 1970s
Black Christmas
Two parallel scores from 443 z-qualifying reviewers and 453 raw-average reviewers. Cohort: Films · 1970s (2,406 peers).
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 title sits
Z-normalized percentile · 2,406 peers in Films · 1970s
| Mean reviewer z-score | +0.445 |
|---|---|
| DB1 raw-mean rating | 7.76 /10 |
| DB2 raw-mean rating | 7.79 /10 |
| 90% CI-floor (z) | +0.367 |
| Reviewers (DB1 / DB2) | 443 / 453 |
Summary
A group of sorority sisters face an escalating reign of terror when an unknown killer begins stalking them during the Christmas holiday season. As mysterious and threatening phone calls increase, the women struggle to identify their attacker and survive the night.
Pipeline applied to this title
The math, in this order
443 stddev>0 reviewers re-centered onto personal z-scale.
Mean z = +0.445. DB2 raw mean = 7.79.
90% CI-floor = +0.367. Thin samples penalized.
Global 84.8 / cohort 80.7. Z-track and raw-track ranked separately.
Cohort: Films · 1970s
