condition mean min max ZT0-3 8.218689999999999 8.218689999999999 8.218689999999999 ZT4-7 25.84235 25.84235 25.84235 ZT8-11 12.50245 12.50245 12.50245 ZT12-15 4.178285 4.178285 4.178285 ZT16-19 1.70746 1.70746 1.70746 ZT20-23 1.832905 1.832905 1.832905