condition mean min max ZT0-3 1.1951024222500002 0.967969128 1.4222357165000001 ZT4-7 6.85828646475 2.0091348235 11.707438106 ZT8-11 114.8115407125 64.41065365 165.212427775 ZT12-15 284.98979502500003 282.05558065 287.92400940000005 ZT16-19 162.14127252499998 154.08605634999998 170.1964887 ZT20-23 286.79898495 223.2649496 350.33302029999993