condition mean min max ZT0-3 125.35000000000001 125.35000000000001 125.35000000000001 ZT4-7 73.5431 73.5431 73.5431 ZT8-11 64.34006666666667 64.34006666666667 64.34006666666667 ZT12-15 73.0212 73.0212 73.0212 ZT16-19 88.10419999999999 88.10419999999999 88.10419999999999 ZT20-23 65.8852 65.8852 65.8852