condition mean min max ZT0-3 687.3 687.3 687.3 ZT4-7 580.2 580.2 580.2 ZT8-11 463.0 463.0 463.0 ZT12-15 644.0 644.0 644.0 ZT16-19 529.75 529.75 529.75 ZT20-23 566.3 566.3 566.3