condition mean min max ZT0-3 53.596025 47.8178 59.37425 ZT4-7 36.0456 36.0456 36.0456 ZT8-11 33.119299999999996 33.119299999999996 33.119299999999996 ZT12-15 0 0 0 ZT16-19 53.12455 53.12455 53.12455 ZT20-23 55.38935 55.38935 55.38935