condition mean min max ZT0-3 2.83184952675 1.010648543 4.6530505105 ZT4-7 21.935899179499998 14.911720024 28.960078335 ZT8-11 112.3095044575 77.699106715 146.9199022 ZT12-15 370.68544317499993 337.00386449999996 404.36702184999996 ZT16-19 247.801006975 223.86447470000002 271.73753925 ZT20-23 201.85150844999998 197.7216105 205.9814064