condition mean min max ZT0-3 85.25 85.25 85.25 ZT4-7 76.6 76.6 76.6 ZT8-11 70.1 70.1 70.1 ZT12-15 99.8 99.8 99.8 ZT16-19 96.9 96.9 96.9 ZT20-23 65.5 65.5 65.5