condition mean min max ZT0-3 10.330400000000001 10.330400000000001 10.330400000000001 ZT4-7 7.884684999999999 7.884684999999999 7.884684999999999 ZT8-11 10.725555 10.725555 10.725555 ZT12-15 10.71655 10.71655 10.71655 ZT16-19 13.543700000000001 13.543700000000001 13.543700000000001 ZT20-23 10.476415 10.476415 10.476415