condition mean min max ZT0-3 0.32796204675 0.14045042300000002 0.5154736705 ZT4-7 1.0806396977500001 0.622040242 1.5392391535 ZT8-11 4.224415221499999 2.734787884 5.714042558999999 ZT12-15 5.8246738205 5.077018916 6.572328725 ZT16-19 5.454919810750001 5.379531419 5.5303082025000005 ZT20-23 5.583158958 5.2273683915 5.9389495245