condition mean min max ZT0-3 25.620449999999998 25.620449999999998 25.620449999999998 ZT4-7 22.94045 22.94045 22.94045 ZT8-11 18.26315 18.26315 18.26315 ZT12-15 19.8325 19.8325 19.8325 ZT16-19 18.889049999999997 18.889049999999997 18.889049999999997 ZT20-23 21.4049 21.4049 21.4049