condition mean min max ZT0-3 6.32307456925 1.544576076 11.1015730625 ZT4-7 19.8022708425 15.897529174999999 23.70701251 ZT8-11 15.511204709000001 13.929587263000002 17.092822155 ZT12-15 2.9393840987499997 1.5871948960000002 4.2915733015 ZT16-19 1.9594322279999998 1.9548362625 1.9640281935 ZT20-23 1.5207622145000002 0.8242552750000001 2.2172691540000002