condition mean min max ZT0-3 69.132442 69.132442 69.132442 ZT4-7 55.425564 55.425564 55.425564 ZT8-11 54.8314895 54.8314895 54.8314895 ZT12-15 64.2267185 64.2267185 64.2267185 ZT16-19 93.4668685 93.4668685 93.4668685 ZT20-23 88.6737535 88.6737535 88.6737535