condition mean min max ZT0-3 533.95 533.95 533.95 ZT4-7 572.1 572.1 572.1 ZT8-11 548.5 548.5 548.5 ZT12-15 547.8 547.8 547.8 ZT16-19 642.5 642.5 642.5 ZT20-23 625.3 625.3 625.3