condition mean min max ZT0-3 26.22111111 26.22111111 26.22111111 ZT4-7 14.66777778 14.66777778 14.66777778 ZT8-11 12.506111109999999 12.506111109999999 12.506111109999999 ZT12-15 12.431111109 12.431111109 12.431111109 ZT16-19 37.95222222333334 37.95222222333334 37.95222222333334 ZT20-23 50.11444444333333 50.11444444333333 50.11444444333333