Experiments and assessments of a 3-DOF haptic device for interactive operation

EURASIP Journal on Image and Video Processing

Table 2 Analysis of variance the maximum operating angle in six movement directions

	Sum of the squares	df	Mean square	F	Significance
X+ (°)
Inter-group	279.912	2	139.956	4.651	0.018
Intra-group	812.525	27	30.094
Sum	1092.437	29
X− (°)
Inter-group	526.287	2	263.144	6.465	0.005
Intra-group	1099.021	27	40.704
Sum	1625.308	29
Y+ (°)
Inter-group	473.750	2	236.875	10.219	0.000
Intra-group	625.872	27	23.180
Sum	1099.622	29
Y− (°)
Inter-group	836.978	2	418.489	5.376	0.011
Intra-group	2101.904	27	77.848
Sum	2938.882	29
Z+ (°)
Inter-group	1769.057	2	884.528	6.194	0.006
Intra-group	3855.782	27	142.807
Sum	5624.839	29
Z− (°)
Inter-group	1160.788	2	580.394	2.300	0.120
Intra-group	6814.036	27	252.372
Sum	7974.824	29

X+ means the positive direction of X-axis, X− means the negative direction of X-axis. The rest in the same way