condition mean min max ZT0-3 15.895804627499999 7.855495495 23.936113759999998 ZT4-7 56.5299991975 56.457403944999996 56.60259445 ZT8-11 62.608522422499995 56.24260837999999 68.974436465 ZT12-15 190.8500406925 156.868372635 224.83170875 ZT16-19 241.31967355 203.88158455 278.75776255 ZT20-23 393.08613337500003 348.1919491 437.98031765