condition mean min max ZT0-3 10.06863 9.964680000000001 10.17258 ZT4-7 9.069645000000001 9.069645000000001 9.069645000000001 ZT8-11 9.747395000000001 9.747395000000001 9.747395000000001 ZT12-15 0 0 0 ZT16-19 10.397955 10.397955 10.397955 ZT20-23 11.246 11.246 11.246