condition mean min max ZT0-3 865.580344 865.580344 865.580344 ZT4-7 1103.9415725 1103.9415725 1103.9415725 ZT8-11 1246.2147605 1246.2147605 1246.2147605 ZT12-15 1367.1308915 1367.1308915 1367.1308915 ZT16-19 1304.73076 1304.73076 1304.73076 ZT20-23 1035.3545315000001 1035.3545315000001 1035.3545315000001