condition mean min max ZT0-3 3810.25 3810.25 3810.25 ZT4-7 3210.5 3210.5 3210.5 ZT8-11 3406.6499999999996 3406.6499999999996 3406.6499999999996 ZT12-15 3174.05 3174.05 3174.05 ZT16-19 3805.4 3805.4 3805.4 ZT20-23 4287.35 4287.35 4287.35