condition mean min max ZT0-3 77.64668333333333 42.9731 107.392 ZT4-7 61.79445 61.79445 61.79445 ZT8-11 53.532399999999996 53.532399999999996 53.532399999999996 ZT12-15 65.86775 56.37175 75.36375 ZT16-19 59.18545 59.18545 59.18545 ZT20-23 70.3848 70.3848 70.3848