condition mean min max ZT0-3 52.3 52.3 52.3 ZT4-7 34.4 34.4 34.4 ZT8-11 55.1 55.1 55.1 ZT12-15 87.30000000000001 87.30000000000001 87.30000000000001 ZT16-19 74.05000000000001 74.05000000000001 74.05000000000001 ZT20-23 76.05000000000001 76.05000000000001 76.05000000000001