condition mean min max ZT0-3 150.77433333333332 140.736 157.72050000000002 ZT4-7 98.64500000000001 98.64500000000001 98.64500000000001 ZT8-11 34.9901 34.9901 34.9901 ZT12-15 30.586000000000002 29.833750000000002 31.338250000000002 ZT16-19 31.63225 31.63225 31.63225 ZT20-23 52.00775 52.00775 52.00775