condition mean min max ZT0-3 1308.001288 1308.001288 1308.001288 ZT4-7 1309.9387735 1309.9387735 1309.9387735 ZT8-11 633.33719 633.33719 633.33719 ZT12-15 779.641727 779.641727 779.641727 ZT16-19 715.4736089999999 715.4736089999999 715.4736089999999 ZT20-23 419.314916 419.314916 419.314916