condition mean min max ZT0-3 1071.004088 1071.004088 1071.004088 ZT4-7 1083.796108 1083.796108 1083.796108 ZT8-11 987.4334860000001 987.4334860000001 987.4334860000001 ZT12-15 1067.6078575000001 1067.6078575000001 1067.6078575000001 ZT16-19 948.970046 948.970046 948.970046 ZT20-23 735.986666 735.986666 735.986666