condition mean min max ZT0-3 0.21061533333333332 0.157013 0.257281 ZT4-7 0.2420195 0.2420195 0.2420195 ZT8-11 0.5282765 0.5282765 0.5282765 ZT12-15 0.90032975 0.857337 0.9433225000000001 ZT16-19 0.3549685 0.3549685 0.3549685 ZT20-23 0.349888 0.349888 0.349888