condition mean min max ZT0-3 0.262413625 0.18970825 0.335119 ZT4-7 0.845205 0.845205 0.845205 ZT8-11 1.1012119999999999 1.1012119999999999 1.1012119999999999 ZT12-15 0 0 0 ZT16-19 0.5968865 0.5968865 0.5968865 ZT20-23 1.125988 1.125988 1.125988