Quantitative Analysis of Electroplated Nickel Coating on Hard Metal

Table 3

Analysis of variance for the coating thickness uniformity.

Source	Sum of square	Degree of freedom	Mean square	𝐹 value	Prob > 𝐹
Model	4.53	2	2.27	33.37	<0.05
Gap distance	0.43	1	0.43	6.36	0.04
Plating time	4.10	1	4.10	60.38	<0.05
Residual	0.41	6	0.07
Pure error		0
Cor total	4.94	8