condition mean min max ZT0-3 28.4779231975 27.89540076 29.060445635 ZT4-7 25.8736346775 24.93728116 26.809988195000003 ZT8-11 11.20344527325 7.997887582000001 14.409002964499999 ZT12-15 7.34053059025 6.8166596285 7.864401552 ZT16-19 28.85175869 20.04857106 37.65494632 ZT20-23 64.036741475 51.774672984999995 76.298809965