Film · 2015 · Films · 2010s
Z for Zachariah
Scored from 121 calibrated IMDb reviewers, each re-centered on their own rating baseline before the title is ranked. Cohort: Films · 2010s (13,059 peers).
Summary
In the aftermath of a nuclear catastrophe, a young woman named Ann Burden survives alone in a sheltered valley that has been spared from radiation. Her solitary existence is disrupted when a scientist named Loomis arrives, and later a third survivor named Caleb, creating a fraught triangle of trust, faith, and desire as they try to rebuild some semblance of life.
Released in 2015, Z for Zachariah is a drama, romance and science-fiction film.
The calibrated figure is built from 121 reviewers whose rating history varies enough to place their own average. A broader pool of 127 reviewers with two or more reviews feeds the raw-average track instead. Rotten Tomatoes carries a separate audience for the same title, 239 of whom clear the calibration test. The cohort it is ranked inside is 2010s films — 13,059 of them.
How the score was built
We compare the reviewers of this title against every other title those same people reviewed. Each review is scored relative to the reviewer's own baseline — a 7/10 from a hard grader sits well above their average, while a 7/10 from a generous grader sits below theirs. Every reviewer then counts the same, so the result is a calibrated consensus rather than a raw average.
- Global percentile
- Where Z for Zachariah lands against every title we rank.
- In-cohort percentile
- The same comparison narrowed to its cohort — titles of the same format released in the same decade. A 1970s film is judged against 1970s films, not against last year's streaming series. Ranked against Films · 2010s (13,059 titles).
- AI-adjusted percentile
- The same reviewer-normalized score, corrected for how much confidence the sample supports: thin samples are pulled toward the corpus average. Each title keeps the share n / (n + 53) of its measured distance from the average, where n is its calibrated-reviewer count, and the result is ranked on the same scale as the global percentile.53 is the median sample size across everything we rank. Here n is 121.
Cohort: Films · 2010s
