And Then There Were None (1945)
Moderate
6.5 ★Why we're confident in this score
393 ratings. The score is reasonably stable but could shift up to 0.11 as more ratings come in.
The Math
Prior (global mean)m = 5.985
Prior weightC = 500
Observed ratingsn = 393
Observed averageR = 7.03
Posterior mean (Bayesian score)6.445
95% confidence interval±0.1148
Formula: posterior_mean = (n / (n + C)) × R + (C / (n + C)) × m. The confidence interval narrows as more ratings come in. Films with few ratings are pulled toward the global mean.
This film vs. typical moderate films
| Metric | This film | Median (moderate) |
|---|---|---|
| Rating count | 393 | 512 |
| 95% CI | ±0.1150 | ±0.1116 |
| Films in tier | 13,152 | |
Last computed: September 18, 2026 at 04:10 AM