condition mean min max ZT0-3 38.248376 38.248376 38.248376 ZT4-7 51.308185 51.308185 51.308185 ZT8-11 35.58506 35.58506 35.58506 ZT12-15 27.4205435 27.4205435 27.4205435 ZT16-19 34.708799 34.708799 34.708799 ZT20-23 41.668153000000004 41.668153000000004 41.668153000000004