condition mean min max ZT0-3 0.7828522244999999 0.487503091 1.0782013579999998 ZT4-7 2.73323893675 2.1856976525 3.2807802209999997 ZT8-11 3.0230397057499996 2.8669046595 3.1791747519999998 ZT12-15 7.722644348999999 6.4146770435 9.0306116545 ZT16-19 9.343236944249998 8.291243372499999 10.395230516 ZT20-23 16.3867328625 14.450027245000001 18.32343848