condition mean min max ZT0-3 179.616672 179.616672 179.616672 ZT4-7 239.69373050000002 239.69373050000002 239.69373050000002 ZT8-11 293.2834245 293.2834245 293.2834245 ZT12-15 190.5668905 190.5668905 190.5668905 ZT16-19 197.5090915 197.5090915 197.5090915 ZT20-23 159.903348 159.903348 159.903348