condition mean min max ZT0-3 114.539749 114.539749 114.539749 ZT4-7 293.6883275 293.6883275 293.6883275 ZT8-11 442.10364300000003 442.10364300000003 442.10364300000003 ZT12-15 342.970949 342.970949 342.970949 ZT16-19 524.1626045 524.1626045 524.1626045 ZT20-23 474.73099350000007 474.73099350000007 474.73099350000007