condition mean min max ZT0-3 59.790996 59.790996 59.790996 ZT4-7 82.4430885 82.4430885 82.4430885 ZT8-11 160.268414 160.268414 160.268414 ZT12-15 95.7458785 95.7458785 95.7458785 ZT16-19 172.22495 172.22495 172.22495 ZT20-23 60.887480000000004 60.887480000000004 60.887480000000004