condition mean min max ZT0-3 56.76535 56.0636 57.9457 ZT4-7 56.509600000000006 56.509600000000006 56.509600000000006 ZT8-11 56.3392 56.3392 56.3392 ZT12-15 76.91975 70.8948 82.9447 ZT16-19 68.2656 68.2656 68.2656 ZT20-23 68.17415 68.17415 68.17415