condition mean min max ZT0-3 14.5182 14.5182 14.5182 ZT4-7 10.49774 10.49774 10.49774 ZT8-11 9.521909999999998 9.521909999999998 9.521909999999998 ZT12-15 12.4809 12.4809 12.4809 ZT16-19 15.021550000000001 15.021550000000001 15.021550000000001 ZT20-23 15.462900000000001 15.462900000000001 15.462900000000001