condition mean min max ZT0-3 330.003295875 316.36082085 343.6457709 ZT4-7 45.366161675 24.59191543 66.14040792 ZT8-11 72.38313263250001 34.641697629999996 110.124567635 ZT12-15 153.805159225 123.28758890000002 184.32272955000002 ZT16-19 220.32016682499997 216.63971054999996 224.00062309999998 ZT20-23 246.3610768 241.40939275 251.31276085000002