condition mean min max ZT0-3 3.57139 2.49993 4.64285 ZT4-7 9.09392 9.09392 9.09392 ZT8-11 4.8659099999999995 4.8659099999999995 4.8659099999999995 ZT12-15 0 0 0 ZT16-19 4.352335 4.352335 4.352335 ZT20-23 3.4451850000000004 3.4451850000000004 3.4451850000000004