condition mean min max ZT0-3 497.70000000000005 497.70000000000005 497.70000000000005 ZT4-7 370.5 370.5 370.5 ZT8-11 462.4 462.4 462.4 ZT12-15 483.54999999999995 483.54999999999995 483.54999999999995 ZT16-19 483.7 483.7 483.7 ZT20-23 544.95 544.95 544.95