condition mean min max ZT0-3 115.00655 94.6281 135.385 ZT4-7 31.216549999999998 31.216549999999998 31.216549999999998 ZT8-11 16.980449999999998 16.980449999999998 16.980449999999998 ZT12-15 0 0 0 ZT16-19 31.774700000000003 31.774700000000003 31.774700000000003 ZT20-23 38.38005 38.38005 38.38005