condition mean min max ZT0-3 447.81918937499995 368.9257832 526.71259555 ZT4-7 537.041046775 478.32435399999997 595.75773955 ZT8-11 342.58292155 294.1702748 390.99556829999995 ZT12-15 262.61117717499997 245.7092723 279.51308205 ZT16-19 393.78106704999993 375.90185694999997 411.66027714999996 ZT20-23 427.91299755 407.99837385 447.82762125