condition mean min max ZT0-3 4558.65 4558.65 4558.65 ZT4-7 6660.8 6660.8 6660.8 ZT8-11 7828.700000000001 7828.700000000001 7828.700000000001 ZT12-15 7811.200000000001 7811.200000000001 7811.200000000001 ZT16-19 6260.9 6260.9 6260.9 ZT20-23 5067.65 5067.65 5067.65