condition mean min max ZT0-3 0.97104668125 0.750540568 1.1915527945 ZT4-7 1.1374147935 0.93776481 1.3370647770000001 ZT8-11 1.2023962175 1.0884867065 1.3163057285000002 ZT12-15 1.48358000575 1.4296808474999998 1.537479164 ZT16-19 1.5331054995 1.1988537535 1.8673572455 ZT20-23 2.23097884575 2.1568568089999998 2.3051008825