condition mean min max ZT0-3 0.13120410899999999 0.0 0.26240821799999997 ZT4-7 3.14061012125 1.9119838335 4.369236409 ZT8-11 10.825139352 8.405369654000001 13.24490905 ZT12-15 22.933469600000002 20.354190755 25.512748445 ZT16-19 18.2175708675 16.197500255 20.23764148 ZT20-23 15.465718384999999 15.314850069999999 15.6165867