condition mean min max ZT0-3 225.29533333333336 186.913 265.28200000000004 ZT4-7 176.1115 176.1115 176.1115 ZT8-11 247.093 247.093 247.093 ZT12-15 570.19375 393.53549999999996 746.8520000000001 ZT16-19 614.1120000000001 614.1120000000001 614.1120000000001 ZT20-23 465.6255 465.6255 465.6255