condition mean min max ZT0-3 44.175275 40.1282 48.222350000000006 ZT4-7 42.0548 42.0548 42.0548 ZT8-11 46.997699999999995 46.997699999999995 46.997699999999995 ZT12-15 0 0 0 ZT16-19 76.47015 76.47015 76.47015 ZT20-23 49.830749999999995 49.830749999999995 49.830749999999995