condition mean min max ZT0-3 964.7 964.7 964.7 ZT4-7 630.2 630.2 630.2 ZT8-11 592.4 592.4 592.4 ZT12-15 411.6 411.6 411.6 ZT16-19 524.7 524.7 524.7 ZT20-23 863.15 863.15 863.15