condition mean min max ZT0-3 0.6262015 0.3677725 0.8846305 ZT4-7 1.326565 1.326565 1.326565 ZT8-11 0.809979 0.809979 0.809979 ZT12-15 0 0 0 ZT16-19 0.5792685 0.5792685 0.5792685 ZT20-23 0.5108334999999999 0.5108334999999999 0.5108334999999999