condition mean min max ZT0-3 565.910558 565.910558 565.910558 ZT4-7 636.7069665 636.7069665 636.7069665 ZT8-11 551.4963455 551.4963455 551.4963455 ZT12-15 468.6821235 468.6821235 468.6821235 ZT16-19 462.64258900000004 462.64258900000004 462.64258900000004 ZT20-23 344.02716499999997 344.02716499999997 344.02716499999997