condition mean min max ZT0-3 126.95 126.95 126.95 ZT4-7 115.6 115.6 115.6 ZT8-11 189.85 189.85 189.85 ZT12-15 236.85000000000002 236.85000000000002 236.85000000000002 ZT16-19 253.25 253.25 253.25 ZT20-23 177.8 177.8 177.8