condition mean min max ZT0-3 0.4834885 0.4834885 0.4834885 ZT4-7 0.64739 0.64739 0.64739 ZT8-11 0.7900615 0.7900615 0.7900615 ZT12-15 0.797276 0.797276 0.797276 ZT16-19 1.0686995000000001 1.0686995000000001 1.0686995000000001 ZT20-23 0.5557515 0.5557515 0.5557515