condition mean min max ZT0-3 4.27863896975 1.705469417 6.8518085225 ZT4-7 21.332604775 16.762000999999998 25.90320855 ZT8-11 34.6866866525 30.35954152 39.013831784999994 ZT12-15 60.632028860000005 49.25062277 72.01343495 ZT16-19 78.44328767249999 70.62832625 86.258249095 ZT20-23 115.55899891 101.43644807000001 129.68154975