condition mean min max ZT0-3 1800.780049 1800.780049 1800.780049 ZT4-7 1595.513841 1595.513841 1595.513841 ZT8-11 1225.6289259999999 1225.6289259999999 1225.6289259999999 ZT12-15 1009.9691205 1009.9691205 1009.9691205 ZT16-19 1426.628044 1426.628044 1426.628044 ZT20-23 348.188961 348.188961 348.188961