condition mean min max ZT0-3 763.2 763.2 763.2 ZT4-7 687.3 687.3 687.3 ZT8-11 687.4 687.4 687.4 ZT12-15 696.55 696.55 696.55 ZT16-19 851.8 851.8 851.8 ZT20-23 864.75 864.75 864.75