Table 2.

Mean ± standard deviation and p-values between each group’s RMSE values of trueness

	Mean ± SD	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6	Group 7
Group 1	0.076 ± 0.010	N/A	0.123	< 0.001*	< 0.001*	0.272	0.999	< 0.001*
Group 2	0.080 ± 0.009	0.123	N/A	< 0.001*	< 0.001*	< 0.001*	0.037	< 0.001*
Group 3	0.107 ± 0.011	< 0.001*	< 0.001*	N/A	< 0.001*	< 0.001*	< 0.001*	0.007*
Group 4	0.046 ± 0.009	< 0.001*	< 0.001*	< 0.001*	N/A	< 0.001*	< 0.001*	< 0.001*
Group 5	0.072 ± 0.007	0.272	< 0.001*	< 0.001*	< 0.001*	N/A	0.547	< 0.001*
Group 6	0.079 ± 0.008	0.999	0.037	< 0.001*	< 0.001*	0.547	N/A	< 0.001*
Group 7	0.124 ± 0.016	< 0.001*	< 0.001*	0.007*	< 0.001*	< 0.001*	< 0.001*	N/A

SD, standard deviation

N/A = “Not applicable”; * p < 0.05