condition mean min max ZT0-3 35.306124999999994 32.709199999999996 37.90305 ZT4-7 62.825900000000004 62.825900000000004 62.825900000000004 ZT8-11 117.42699999999999 117.42699999999999 117.42699999999999 ZT12-15 0 0 0 ZT16-19 72.95439999999999 72.95439999999999 72.95439999999999 ZT20-23 56.332750000000004 56.332750000000004 56.332750000000004