condition mean min max ZT0-3 150.546416 150.546416 150.546416 ZT4-7 1036.1481155000001 1036.1481155000001 1036.1481155000001 ZT8-11 1923.8336359999998 1923.8336359999998 1923.8336359999998 ZT12-15 1186.650196 1186.650196 1186.650196 ZT16-19 588.7961760000001 588.7961760000001 588.7961760000001 ZT20-23 323.634998 323.634998 323.634998