condition mean min max ZT0-3 3469.45 3469.45 3469.45 ZT4-7 4167.1 4167.1 4167.1 ZT8-11 4078.3999999999996 4078.3999999999996 4078.3999999999996 ZT12-15 3923.1 3923.1 3923.1 ZT16-19 4375.0 4375.0 4375.0 ZT20-23 4127.35 4127.35 4127.35