condition mean min max ZT0-3 217.8805 217.8805 217.8805 ZT4-7 301.95000000000005 301.95000000000005 301.95000000000005 ZT8-11 113.06450000000001 113.06450000000001 113.06450000000001 ZT12-15 75.7553 75.7553 75.7553 ZT16-19 36.1027 36.1027 36.1027 ZT20-23 108.6285 108.6285 108.6285