Frequency of D21S11 28 01646 Frequency of D21S11 29 02042

Frequency of D21S11 28 = 0.1646 Frequency of D21S11 29 = 0.2042 If scenario 1 is that both people are known and account for the data, and scenario two is that the result is from two unknown individuals, what is the likelihood ratio for the D21S11 result above. (The result needs to be expressed as the equation and a numerical result.)

Solution

Answer: Liklihood ratio actually compare the probability of two mutually exclusive hypothesis

H(0)[null hypothesis]= Both People are known and account for the data

H(1)[alternative hypothesis]= Both people are unknown

Now set the two probability as a ratio

Liklihood ratio (LR)= H0/H1

Therefore LR= 0.1646/0.2042

= 0.8060

If LR is greater than 1 it support null hypothesis and if less than 1 than support alternative hypothesis.

Here LR ratio for D21S11 is 0.8060 and it support the alternative hypothesis that the result is from two unknown individuals.