Z_1t

0.7163

2.5763

0.0026

X × Z_1t

0.2018

3.1661

0.0170

X × Z_2t

0.1387

1.1773

0.0164

X × Z_3t

0.1268

1.0635

0.0317

X × Z_4t

0.1346

1.1095

0.0208

R² = 0.8715, P = 0, F = 927.4380