condition mean min max ZT0-3 26.0823731985 16.140445037 36.02430136 ZT4-7 5.16183910075 4.7632083555 5.560469846 ZT8-11 12.352219842499998 10.070535034999999 14.63390465 ZT12-15 52.5372236575 28.698069915 76.3763774 ZT16-19 118.398909275 113.79888715 122.9989314 ZT20-23 113.9250320275 106.591157955 121.25890609999999