Table 1 Distribution of relative pairs across cemeteries.

From: Social stratification without genetic differentiation at the site of Kulubnarti in Christian Period Nubia

 

Observed within-cemetery relative pairs

Observed cross-cemetery relative pairs

Total relative pairs

Number of individuals involved in relative pairs

Expected probability of randomly drawing cross-cemetery relatives

Expected cross-cemetery relative pairs

\(\tfrac{{{{{{\rm{Observed}}}}}}}{{{{{{\rm{Expected}}}}}}}\) cross-cemetery relative pairs

P-value from a binomial distribution (probability of as few cross-cemetery relative pairs as observed)

 

R

S

R

S

1st degree

1

3

0

4

2

6

0.429

1.71

0%

0.107

2nd degree

2

5

2

9

6

11

0.485

4.37

46%

0.105

3rd degree

1

8

4

13

4

17

0.324

4.21

95%

0.582

1st + 2nd degree

3

8

2

13

8

16

0.464

6.03

33%

0.021

1st + 2nd + 3rd degree

4

16

6

26

10

22

0.444

11.53

52%

0.021

  1. We compute the expected probability that two randomly chosen individuals of known-degree relatedness are cross-cemetery relatives based on the number of individuals detected as part of relative pairs in each cemetery. We compute a p-value from a binomial distribution of detecting as many cross-cemetery relative pairs as observed or fewer.
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