condition mean min max ZT0-3 441.6 441.6 441.6 ZT4-7 600.4 600.4 600.4 ZT8-11 492.4 492.4 492.4 ZT12-15 505.40000000000003 505.40000000000003 505.40000000000003 ZT16-19 418.35 418.35 418.35 ZT20-23 423.35 423.35 423.35