condition mean min max ZT0-3 74.94752 74.94752 74.94752 ZT4-7 97.0454225 97.0454225 97.0454225 ZT8-11 139.88629699999998 139.88629699999998 139.88629699999998 ZT12-15 146.1552695 146.1552695 146.1552695 ZT16-19 84.68270100000001 84.68270100000001 84.68270100000001 ZT20-23 47.822488 47.822488 47.822488