condition mean min max ZT0-3 2016.7624015000001 1871.0927420000003 2162.432061 ZT4-7 1562.6062180500003 1148.5188936000002 1976.6935425000001 ZT8-11 462.67291425 315.3446887 610.0011398 ZT12-15 444.81128202499997 310.08967245 579.5328916 ZT16-19 846.779162925 844.3111191 849.24720675 ZT20-23 784.1296207 783.41398845 784.84525295