condition mean min max ZT0-3 62.5386 57.087450000000004 69.641 ZT4-7 47.29745 47.29745 47.29745 ZT8-11 31.04775 31.04775 31.04775 ZT12-15 47.1963 29.5868 64.8058 ZT16-19 56.19155 56.19155 56.19155 ZT20-23 50.968 50.968 50.968