condition mean min max ZT0-3 26.49375 26.49375 26.49375 ZT4-7 27.097254999999997 27.097254999999997 27.097254999999997 ZT8-11 24.204733 24.204733 24.204733 ZT12-15 99.602129 99.602129 99.602129 ZT16-19 35.676578500000005 35.676578500000005 35.676578500000005 ZT20-23 123.915934 123.915934 123.915934