condition mean min max ZT0-3 501.95000000000005 501.95000000000005 501.95000000000005 ZT4-7 496.9 496.9 496.9 ZT8-11 455.0 455.0 455.0 ZT12-15 414.1 414.1 414.1 ZT16-19 503.25 503.25 503.25 ZT20-23 563.1 563.1 563.1