condition mean min max ZT0-3 57.82745 57.82745 57.82745 ZT4-7 37.5885 37.5885 37.5885 ZT8-11 10.557454 10.557454 10.557454 ZT12-15 34.64154333333333 34.64154333333333 34.64154333333333 ZT16-19 37.154520000000005 37.154520000000005 37.154520000000005 ZT20-23 64.91577 64.91577 64.91577