condition mean min max ZT0-3 1.56748 1.316295 1.818665 ZT4-7 2.673645 2.673645 2.673645 ZT8-11 3.100415 3.100415 3.100415 ZT12-15 0 0 0 ZT16-19 3.2786049999999998 3.2786049999999998 3.2786049999999998 ZT20-23 2.81538 2.81538 2.81538