condition mean min max ZT0-3 138.8752182 100.4462677 177.30416870000002 ZT4-7 222.129119225 218.19904585 226.0591926 ZT8-11 176.05813285 167.5109676 184.60529809999997 ZT12-15 116.433631165 101.610012165 131.257250165 ZT16-19 107.89855538500001 101.87931182 113.91779895 ZT20-23 109.94528709999999 105.8065116 114.08406259999998