condition mean min max ZT0-3 0.48109765275 0.3556311245 0.606564181 ZT4-7 0.19077876200000002 0.08445111150000001 0.29710641250000003 ZT8-11 11.7172414445 4.2076173405 19.2268655485 ZT12-15 26.056206109999998 25.11449528 26.99791694 ZT16-19 9.10094944475 6.430690951 11.771207938500002 ZT20-23 1.8211307755 1.1299320339999999 2.512329517