condition mean min max ZT0-3 0.27216133333333337 0.0 0.582245 ZT4-7 2.10359 2.10359 2.10359 ZT8-11 1.1946455 1.1946455 1.1946455 ZT12-15 0.75583875 0.1981625 1.313515 ZT16-19 1.12299 1.12299 1.12299 ZT20-23 0.0 0.0 0.0