condition mean min max ZT0-3 776.1 776.1 776.1 ZT4-7 648.8 648.8 648.8 ZT8-11 748.0999999999999 748.0999999999999 748.0999999999999 ZT12-15 772.2 772.2 772.2 ZT16-19 970.4 970.4 970.4 ZT20-23 847.0 847.0 847.0