condition mean min max ZT0-3 39.62075 39.62075 39.62075 ZT4-7 35.49575 35.49575 35.49575 ZT8-11 16.96855 16.96855 16.96855 ZT12-15 19.104300000000002 19.104300000000002 19.104300000000002 ZT16-19 26.57425 26.57425 26.57425 ZT20-23 39.4548 39.4548 39.4548