condition mean min max ZT0-3 1004.501288 1004.501288 1004.501288 ZT4-7 815.8480735 815.8480735 815.8480735 ZT8-11 877.6560475 877.6560475 877.6560475 ZT12-15 910.989167 910.989167 910.989167 ZT16-19 932.265858 932.265858 932.265858 ZT20-23 931.6428605 931.6428605 931.6428605