condition mean min max ZT0-3 55.799350000000004 54.79665 56.80205 ZT4-7 33.0187 33.0187 33.0187 ZT8-11 19.0452 19.0452 19.0452 ZT12-15 0 0 0 ZT16-19 30.90465 30.90465 30.90465 ZT20-23 39.963449999999995 39.963449999999995 39.963449999999995