condition mean min max ZT0-3 65.493 65.493 65.493 ZT4-7 52.701499999999996 52.701499999999996 52.701499999999996 ZT8-11 38.0727 38.0727 38.0727 ZT12-15 42.1075 42.1075 42.1075 ZT16-19 64.01095 64.01095 64.01095 ZT20-23 70.5754 70.5754 70.5754