Table 1: Dahlberg’s test: applied to the entire sample and repeated twice revealed no statistically significant systematic measurement errors. The systematic error calculated via Student’s t-test for paired data yielded a significance level of 0.05.

VariableDahlberg’s test value

ANB0.119050.950475
IMPA-r0.536310.369756
11/SNA-SNP0.648450.165493
OJ-r0.006900.065285
IMPA-l1.490480.673221
OJ-l0.004170.617962
21/SNA-SNP1.350000.098852