condition mean min max ZT0-3 53.763020005 48.06423907 59.46180094 ZT4-7 63.276477195 54.90777896 71.64517543 ZT8-11 94.46237084 75.21449543 113.71024625000001 ZT12-15 75.9350785325 59.12507776 92.74507930499999 ZT16-19 48.782615895000006 47.616071755 49.949160035000006 ZT20-23 49.2827219525 48.652999475 49.91244443