condition mean min max ZT0-3 147.490026 147.490026 147.490026 ZT4-7 171.22500250000002 171.22500250000002 171.22500250000002 ZT8-11 243.05886750000002 243.05886750000002 243.05886750000002 ZT12-15 165.66768050000002 165.66768050000002 165.66768050000002 ZT16-19 74.68531850000001 74.68531850000001 74.68531850000001 ZT20-23 54.8134245 54.8134245 54.8134245