condition mean min max ZT0-3 411.99424999999997 410.42999999999995 413.5585 ZT4-7 242.185 242.185 242.185 ZT8-11 98.69245000000001 98.69245000000001 98.69245000000001 ZT12-15 0 0 0 ZT16-19 107.7014 107.7014 107.7014 ZT20-23 267.5505 267.5505 267.5505