10.11 Converting to p-values
How do we know whether the ABBA-BABA counts are significantly different? We can convert the Z score into a p-value:
## W X Y Z D stderr Zscore BABA ABBA nsnps
## 1 French Sardinian Vindija Chimp 0.0038 0.0074 0.511 10974 10891 487843
## p
## 1 0.6093511
Interpretation of this p-value
The p-value does not look significant (no introgression into the ancestors of this French or Sardinian individual). This is in line with our observation that there doesn’t seem to be a disproportionate amount of ABBA or BABA sites.