condition mean min max ZT0-3 0.17458705 0.17458705 0.17458705 ZT4-7 0.07755095 0.07755095 0.07755095 ZT8-11 0.06674455 0.06674455 0.06674455 ZT12-15 0.26848150000000004 0.26848150000000004 0.26848150000000004 ZT16-19 0.5871705 0.5871705 0.5871705 ZT20-23 0.42999350000000003 0.42999350000000003 0.42999350000000003