condition mean min max ZT0-3 334.23525 325.432 343.0385 ZT4-7 378.15549999999996 378.15549999999996 378.15549999999996 ZT8-11 309.5195 309.5195 309.5195 ZT12-15 0 0 0 ZT16-19 197.995 197.995 197.995 ZT20-23 239.7245 239.7245 239.7245