condition mean min max ZT0-3 77.0434 76.92355 77.16325 ZT4-7 77.4879 77.4879 77.4879 ZT8-11 187.01049999999998 187.01049999999998 187.01049999999998 ZT12-15 0 0 0 ZT16-19 201.3155 201.3155 201.3155 ZT20-23 137.247 137.247 137.247