condition mean min max ZT0-3 113.130744 113.130744 113.130744 ZT4-7 68.322068 68.322068 68.322068 ZT8-11 62.697131999999996 62.697131999999996 62.697131999999996 ZT12-15 90.4007795 90.4007795 90.4007795 ZT16-19 109.73051699999999 109.73051699999999 109.73051699999999 ZT20-23 113.2956495 113.2956495 113.2956495