condition mean min max ZT0-3 73.85969759 66.93500404 80.78439114 ZT4-7 99.737956735 99.64280128666667 99.83311218333333 ZT8-11 76.13431364499999 68.65213616333334 83.61649112666666 ZT12-15 68.22883576000001 61.43019194 75.02747958 ZT16-19 69.75707336333333 68.91778909666667 70.59635763 ZT20-23 66.92954395166667 59.56394434 74.29514356333334