condition mean min max ZT0-3 17.43 17.43 17.43 ZT4-7 8.106874999999999 8.106874999999999 8.106874999999999 ZT8-11 6.326605 6.326605 6.326605 ZT12-15 22.0816 22.0816 22.0816 ZT16-19 14.21455 14.21455 14.21455 ZT20-23 22.764200000000002 22.764200000000002 22.764200000000002