condition mean min max ZT0-3 506.55 506.55 506.55 ZT4-7 505.5 505.5 505.5 ZT8-11 417.15000000000003 417.15000000000003 417.15000000000003 ZT12-15 322.25 322.25 322.25 ZT16-19 375.8 375.8 375.8 ZT20-23 322.85 322.85 322.85