Friday the 13th (1980)
Moderate
6.4 ★Why we're confident in this score
3,168 ratings. The score is reasonably stable but could shift up to 0.06 as more ratings come in.
The Math
Prior (global mean)m = 5.985
Prior weightC = 500
Observed ratingsn = 3,168
Observed averageR = 6.41
Posterior mean (Bayesian score)6.355
95% confidence interval±0.06
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 | 3,168 | 511 |
| 95% CI | ±0.0600 | ±0.1117 |
| Films in tier | 13,073 | |
Last computed: May 16, 2026 at 01:21 AM