condition mean min max ZT0-3 4.9336199999999995 4.76415 5.10309 ZT4-7 4.292125 4.292125 4.292125 ZT8-11 2.9446000000000003 2.9446000000000003 2.9446000000000003 ZT12-15 0 0 0 ZT16-19 3.64077 3.64077 3.64077 ZT20-23 5.68924 5.68924 5.68924