condition mean min max ZT0-3 11.6776665765 10.820826223000001 12.53450693 ZT4-7 7.37918982675 7.3077764215 7.450603232 ZT8-11 6.5330130125 6.085237553999999 6.980788470999999 ZT12-15 3.58573428375 3.3917881105 3.7796804569999995 ZT16-19 6.834242863249999 5.341423299 8.3270624275 ZT20-23 8.65521716075 7.430470905 9.8799634165