extremely significantP < 0.01
The selected independent variables were Z 3 , Z 5 , and Z 6 (P < 0.05), of which Z 3 and Z 6 reached an extremely significant level (P < 0.01).
The selected independent variables were Z 3 , Z 5 , and Z 6 (P < 0.05), of which Z 3 and Z 6 reached an extremely significant level (P < 0.01).