condition mean min max ZT0-3 0.021644049999999998 0.021644049999999998 0.021644049999999998 ZT4-7 0.0177795 0.0177795 0.0177795 ZT8-11 0.01446095 0.01446095 0.01446095 ZT12-15 0.029374900000000002 0.029374900000000002 0.029374900000000002 ZT16-19 0.054475499999999996 0.054475499999999996 0.054475499999999996 ZT20-23 0.0906168 0.0906168 0.0906168