condition mean min max ZT0-3 52.241352 52.241352 52.241352 ZT4-7 64.054677 64.054677 64.054677 ZT8-11 71.1123235 71.1123235 71.1123235 ZT12-15 55.444966 55.444966 55.444966 ZT16-19 52.77206699999999 52.77206699999999 52.77206699999999 ZT20-23 35.671910499999996 35.671910499999996 35.671910499999996