condition mean min max ZT0-3 90.6 90.6 90.6 ZT4-7 96.9 96.9 96.9 ZT8-11 65.85 65.85 65.85 ZT12-15 95.30000000000001 95.30000000000001 95.30000000000001 ZT16-19 83.0 83.0 83.0 ZT20-23 99.3 99.3 99.3