condition mean min max ZT0-3 0.5453135 0.541718 0.5489090000000001 ZT4-7 0.833678 0.833678 0.833678 ZT8-11 8.11278 8.11278 8.11278 ZT12-15 0 0 0 ZT16-19 2.1587300000000003 2.1587300000000003 2.1587300000000003 ZT20-23 0.9497690000000001 0.9497690000000001 0.9497690000000001