condition mean min max ZT0-3 27.136266666666668 27.136266666666668 27.136266666666668 ZT4-7 26.90365 26.90365 26.90365 ZT8-11 25.96085 25.96085 25.96085 ZT12-15 24.967100000000002 24.967100000000002 24.967100000000002 ZT16-19 25.5341 25.5341 25.5341 ZT20-23 26.203300000000002 26.203300000000002 26.203300000000002