condition mean min max ZT0-3 94.80000000000001 94.80000000000001 94.80000000000001 ZT4-7 50.9 50.9 50.9 ZT8-11 145.85 145.85 145.85 ZT12-15 90.1 90.1 90.1 ZT16-19 136.2 136.2 136.2 ZT20-23 117.75 117.75 117.75