condition mean min max ZT0-3 36.0575 36.0575 36.0575 ZT4-7 41.3923 41.3923 41.3923 ZT8-11 14.6493 14.6493 14.6493 ZT12-15 15.7978 15.7978 15.7978 ZT16-19 19.5045 19.5045 19.5045 ZT20-23 32.799800000000005 32.799800000000005 32.799800000000005