condition mean min max ZT0-3 112.53975 98.745 126.33449999999999 ZT4-7 91.61855 91.61855 91.61855 ZT8-11 119.12349999999999 119.12349999999999 119.12349999999999 ZT12-15 0 0 0 ZT16-19 143.573 143.573 143.573 ZT20-23 142.1565 142.1565 142.1565