condition mean min max ZT0-3 52.20455 52.20455 52.20455 ZT4-7 43.3157 43.3157 43.3157 ZT8-11 43.7102 43.7102 43.7102 ZT12-15 38.463300000000004 38.463300000000004 38.463300000000004 ZT16-19 65.09755 65.09755 65.09755 ZT20-23 64.2335 64.2335 64.2335