condition mean min max ZT0-3 46.2727 46.2727 46.2727 ZT4-7 32.88485 32.88485 32.88485 ZT8-11 27.43675 27.43675 27.43675 ZT12-15 32.7334 32.7334 32.7334 ZT16-19 53.296350000000004 53.296350000000004 53.296350000000004 ZT20-23 46.4701 46.4701 46.4701