mixtures

Question 1

what is a mixture?

Answer 1

2 or more individuals contributing to a single sample making interpretation a challenge
often are evidence samples

Question 2

problems that mixtures cause

Answer 2

can’t determine order of deposition
prevents statistical evaluation
likely gone undetected w/ systems that don’t have high sensitivity

Question 3

statistical interpretation

Answer 3

LR = prob. of adventitious match/ prob. of match
odds = prob / 1-prob
Pr(A and B) = P(A) x P(B given A)