condition mean min max ZT0-3 497.5 497.5 497.5 ZT4-7 389.8 389.8 389.8 ZT8-11 596.1500000000001 596.1500000000001 596.1500000000001 ZT12-15 496.85 496.85 496.85 ZT16-19 512.85 512.85 512.85 ZT20-23 419.65 419.65 419.65