condition mean min max ZT0-3 63.57535 55.49025 71.66045 ZT4-7 50.81325 50.81325 50.81325 ZT8-11 71.01400000000001 71.01400000000001 71.01400000000001 ZT12-15 0 0 0 ZT16-19 92.7301 92.7301 92.7301 ZT20-23 76.72515 76.72515 76.72515