condition mean min max ZT0-3 572.05 572.05 572.05 ZT4-7 426.7 426.7 426.7 ZT8-11 431.4 431.4 431.4 ZT12-15 422.70000000000005 422.70000000000005 422.70000000000005 ZT16-19 474.3 474.3 474.3 ZT20-23 431.5 431.5 431.5