condition mean min max ZT0-3 566.881961 566.881961 566.881961 ZT4-7 549.9630354999999 549.9630354999999 549.9630354999999 ZT8-11 750.24544 750.24544 750.24544 ZT12-15 533.477076 533.477076 533.477076 ZT16-19 484.742932 484.742932 484.742932 ZT20-23 290.1192195 290.1192195 290.1192195