condition mean min max ZT0-3 100.641484 100.641484 100.641484 ZT4-7 112.6338465 112.6338465 112.6338465 ZT8-11 73.7307945 73.7307945 73.7307945 ZT12-15 70.8763275 70.8763275 70.8763275 ZT16-19 94.49825 94.49825 94.49825 ZT20-23 115.21886649999999 115.21886649999999 115.21886649999999