condition mean min max ZT0-3 0.898625714 0.817537693 0.979713735 ZT4-7 1.57903548 1.0566358845 2.1014350755 ZT8-11 3.55519184425 2.843264885 4.2671188035 ZT12-15 4.63462340725 4.3383080955 4.930938719 ZT16-19 2.1132728515 1.6030242305 2.6235214725000002 ZT20-23 0.80068879225 0.725402136 0.8759754485