condition mean min max ZT0-3 0.04924265 0.04924265 0.04924265 ZT4-7 0.10716439999999999 0.10716439999999999 0.10716439999999999 ZT8-11 0.1455725 0.1455725 0.1455725 ZT12-15 0.5411684999999999 0.5411684999999999 0.5411684999999999 ZT16-19 0.31758450000000005 0.31758450000000005 0.31758450000000005 ZT20-23 0.268915 0.268915 0.268915