condition mean min max ZT0-3 1.46357 1.46357 1.46357 ZT4-7 1.0827849999999999 1.0827849999999999 1.0827849999999999 ZT8-11 1.054303 1.054303 1.054303 ZT12-15 1.72746 1.72746 1.72746 ZT16-19 1.413792 1.413792 1.413792 ZT20-23 1.444765 1.444765 1.444765