condition mean min max ZT0-3 20.2023 20.2023 20.2023 ZT4-7 17.6496 17.6496 17.6496 ZT8-11 29.3781 29.3781 29.3781 ZT12-15 30.53105 30.53105 30.53105 ZT16-19 37.520199999999996 37.520199999999996 37.520199999999996 ZT20-23 35.68503333333334 35.68503333333334 35.68503333333334