condition mean min max ZT0-3 73.6914 73.6914 73.6914 ZT4-7 35.72105 35.72105 35.72105 ZT8-11 26.90005 26.90005 26.90005 ZT12-15 17.90025 17.90025 17.90025 ZT16-19 35.16205 35.16205 35.16205 ZT20-23 56.731300000000005 56.731300000000005 56.731300000000005