condition mean min max ZT0-3 308.95000000000005 308.95000000000005 308.95000000000005 ZT4-7 321.3 321.3 321.3 ZT8-11 463.70000000000005 463.70000000000005 463.70000000000005 ZT12-15 430.54999999999995 430.54999999999995 430.54999999999995 ZT16-19 415.6 415.6 415.6 ZT20-23 364.54999999999995 364.54999999999995 364.54999999999995