condition mean min max ZT0-3 779.8499999999999 779.8499999999999 779.8499999999999 ZT4-7 595.3 595.3 595.3 ZT8-11 696.4 696.4 696.4 ZT12-15 830.05 830.05 830.05 ZT16-19 832.95 832.95 832.95 ZT20-23 895.4000000000001 895.4000000000001 895.4000000000001