condition mean min max ZT0-3 52.5538 52.5538 52.5538 ZT4-7 45.76745 45.76745 45.76745 ZT8-11 39.0644 39.0644 39.0644 ZT12-15 38.9337 38.9337 38.9337 ZT16-19 51.968500000000006 51.968500000000006 51.968500000000006 ZT20-23 49.346199999999996 49.346199999999996 49.346199999999996