condition mean min max ZT0-3 12.6684 12.6684 12.6684 ZT4-7 9.709165 9.709165 9.709165 ZT8-11 13.828299999999999 13.828299999999999 13.828299999999999 ZT12-15 25.4341 25.4341 25.4341 ZT16-19 20.72355 20.72355 20.72355 ZT20-23 12.70765 12.70765 12.70765