condition mean min max ZT0-3 332.4 332.4 332.4 ZT4-7 401.8 401.8 401.8 ZT8-11 309.75 309.75 309.75 ZT12-15 239.85000000000002 239.85000000000002 239.85000000000002 ZT16-19 160.8 160.8 160.8 ZT20-23 225.85 225.85 225.85