condition mean min max ZT0-3 318.298785 318.298785 318.298785 ZT4-7 102.39994300000001 102.39994300000001 102.39994300000001 ZT8-11 252.43543749999998 252.43543749999998 252.43543749999998 ZT12-15 724.8000480000001 724.8000480000001 724.8000480000001 ZT16-19 1817.822639 1817.822639 1817.822639 ZT20-23 2586.616672 2586.616672 2586.616672