condition mean min max ZT0-3 53.213525000000004 50.27435 56.1527 ZT4-7 46.0649 46.0649 46.0649 ZT8-11 50.7491 50.7491 50.7491 ZT12-15 0 0 0 ZT16-19 53.981350000000006 53.981350000000006 53.981350000000006 ZT20-23 36.43655 36.43655 36.43655