condition mean min max ZT0-3 26.4 26.4 26.4 ZT4-7 24.0 24.0 24.0 ZT8-11 24.95 24.95 24.95 ZT12-15 31.900000000000002 31.900000000000002 31.900000000000002 ZT16-19 37.5 37.5 37.5 ZT20-23 18.6 18.6 18.6