condition mean min max ZT0-3 54.851111110000005 54.851111110000005 54.851111110000005 ZT4-7 28.33111111 28.33111111 28.33111111 ZT8-11 16.253333332333334 16.253333332333334 16.253333332333334 ZT12-15 72.1888889 72.1888889 72.1888889 ZT16-19 107.86999999 107.86999999 107.86999999 ZT20-23 80.03777778 80.03777778 80.03777778