condition mean min max ZT0-3 0.40692866666666666 0.3127455 0.537206 ZT4-7 0.22527550000000002 0.22527550000000002 0.22527550000000002 ZT8-11 0.3076725 0.3076725 0.3076725 ZT12-15 0.46077475 0.4605615 0.460988 ZT16-19 0.5393815 0.5393815 0.5393815 ZT20-23 0.37061049999999995 0.37061049999999995 0.37061049999999995