LR 01: Likelihood ratio
and the binomial distribution
A suspect is apprehended with 10 mobile phones in his possession,
of which 7 are contaminated with cocaine.
Assume that database studies of mobile phones show that mobile phones from persons
convicted of handling cocaine show a 76% contamination rate, while mobile phones
from the general population show a 5.5% contamination rate.
Calculate the likelihood
ratio for the evidence using the hypotheses:
- Prosecution: The suspect had deliberate contact with cocaine.
- Defence: The contamination of the mobile phones was
Video Answer: 1.58 ×106 .