Location: Ptuj, Slovenia (August 2020)
Observation periods:
Hypotheses:
Test parameters: One-tailed z-test, α = 0.05, Power = 90%
Using G*Power methodology with arcsine transformation for proportions:
Result for H₀ = 75%:
n = 144 random observations needed MISPRINT n = 15 THE CHART IS CORRECT
Cohen's h = 0.647 (medium effect size) NO, IT'S 0.763 LIKE IT SAYS IN THE CHART
⚠️ Methodological Comparison:
Two statistical approaches for consecutive observations yield different results. Both are mathematically valid but serve different purposes.
Standard SPRT using Type I and Type II error thresholds:
k = 13
Use case: Standard scientific research
Likelihood ratio test with conservative threshold to account for overshoot and legal standards:
k = 37
Use case: Legal proceedings requiring extreme confidence
Why the 185% difference?
Both are mathematically sound. Method 2 prioritizes avoiding Type I errors (false positives) at the cost of requiring more observations.
Legal Verdict for H₀ = 75%:
| Standard method: | 13 consecutive observations required |
| Conservative method: | 37 consecutive observations required |
| Ptuj Police recorded: | ZERO observations |
Even using the most lenient statistical standard, the warrant lacked the evidentiary basis required for 90% confidence in distinguishing normal lighting from abnormal lighting patterns.
| H₀ (%) | Cohen's h | Effect Size | Random n | Sequential k (Basic) | Sequential k (Conservative) |
|---|
Summary for Defense:
The warrant was issued without meeting any scientifically defensible evidentiary threshold.
Generated: | Cohen's h = 0.647 (medium effect)