condition mean min max ZT0-3 12.3031 12.3031 12.3031 ZT4-7 8.792349999999999 8.792349999999999 8.792349999999999 ZT8-11 10.27016 10.27016 10.27016 ZT12-15 9.805025 9.805025 9.805025 ZT16-19 13.09975 13.09975 13.09975 ZT20-23 13.047550000000001 13.047550000000001 13.047550000000001