condition mean min max ZT0-3 718.7 718.7 718.7 ZT4-7 644.1 644.1 644.1 ZT8-11 649.9 649.9 649.9 ZT12-15 592.8 592.8 592.8 ZT16-19 696.2 696.2 696.2 ZT20-23 821.3 821.3 821.3