Table 1. The average and maximum absolute discrepancy (AAD and MAD) values.

	3D Printer	N	Mean	Standard Deviation	Standard Error	95% Confidence Interval for Mean
						Lower Bound	Upper Bound	Minimum	Maximum
Average absolute discrepancy (AAD)	Qidi Tech	10	0.649285	0.075133	0.023759	0.595538	0.703032	0.53465	0.7378
	Mars 2 Pro	10	0.047295	0.022552	0.007132	0.031162	0.063428	0.02755	0.0843
	Form 3B	10	0.037355	0.005282	0.00167	0.033577	0.041134	0.03225	0.04955
	Total	30	0.244645	0.294322	0.053736	0.134744	0.354547	0.02755	0.7378
Maximum absolute discrepancy (MAD)	Qidi Tech	10	3.69648	0.277722	0.087823	3.49781	3.89515	3.32295	3.98195
	Mars 2 Pro	10	0.21073	0.117749	0.037236	0.126497	0.294963	0.00165	0.38265
	Form 3B	10	0.20808	0.031133	0.009845	0.185809	0.230351	0.1784	0.272
	Total	30	1.371763	1.680438	0.306805	0.744277	1.999249	0.00165	3.98195