condition mean min max ZT0-3 14.16485 13.8796 14.450099999999999 ZT4-7 9.891210000000001 9.891210000000001 9.891210000000001 ZT8-11 15.297899999999998 15.297899999999998 15.297899999999998 ZT12-15 0 0 0 ZT16-19 17.24915 17.24915 17.24915 ZT20-23 16.1551 16.1551 16.1551