Table 8: Basis functions and important explanatory variables for the MARS model with .

FunctionStd. dev.Cost of omissionNumber of BFVariableRelative importance (%)

10.5790.1792 100.000
20.5650.1762 98.746
30.4500.1602 91.803
40.4340.1512 87.535
50.2950.0722 31.978
60.2930.0722 31.287
70.2490.0691 26.538
80.2220.0671 23.337