condition mean min max ZT0-3 26.716949999999997 26.716949999999997 26.716949999999997 ZT4-7 16.37185 16.37185 16.37185 ZT8-11 12.55315 12.55315 12.55315 ZT12-15 24.24175 24.24175 24.24175 ZT16-19 30.0072 30.0072 30.0072 ZT20-23 32.253 32.253 32.253