condition mean min max ZT0-3 0.45577399999999996 0.3635265 0.5561775 ZT4-7 0.105798 0.105798 0.105798 ZT8-11 0.44459000000000004 0.44459000000000004 0.44459000000000004 ZT12-15 0.47578 0.473551 0.47800899999999996 ZT16-19 0.4227925 0.4227925 0.4227925 ZT20-23 0.476939 0.476939 0.476939