condition mean min max ZT0-3 416.7 416.7 416.7 ZT4-7 414.6 414.6 414.6 ZT8-11 456.54999999999995 456.54999999999995 456.54999999999995 ZT12-15 513.5 513.5 513.5 ZT16-19 602.1 602.1 602.1 ZT20-23 509.0 509.0 509.0