condition mean min max ZT0-3 12.37692505075 2.4615022509999998 22.2923478505 ZT4-7 52.380017025 48.642053565000005 56.117980485000004 ZT8-11 59.5798100025 58.992940544999996 60.16667946 ZT12-15 29.419659884749997 23.0778890695 35.7614307 ZT16-19 17.3436057625 14.68718692 20.000024605 ZT20-23 40.35225445 29.108377885 51.596131015