Usability in the Product Design Process Based on the Intelligent Microprocessor

Table 5

Comparison results of characteristics.

Group	Number of observations	Sum	Mean	Variance
Horizontal layout	12	74625	6218.75	24335.48
Vertical layout	12	78960	6580	82093.27
Central layout	11	69854	6574	62478.21
Edge layout	10	66857	6614	52142.32