condition mean min max ZT0-3 13.9681156445 7.672250228999999 20.26398106 ZT4-7 63.35382670999999 45.897335209999994 80.81031820999999 ZT8-11 141.36515281500002 106.22767523 176.50263040000002 ZT12-15 102.102066915 60.44704132 143.75709250999998 ZT16-19 24.579347203250002 14.978715246499998 34.17997916 ZT20-23 3.2325159575 1.488296281 4.976735634