condition mean min max ZT0-3 311.52250000000004 311.52250000000004 311.52250000000004 ZT4-7 301.8085 301.8085 301.8085 ZT8-11 278.3165 278.3165 278.3165 ZT12-15 250.1045 250.1045 250.1045 ZT16-19 324.7785 324.7785 324.7785 ZT20-23 303.2015 303.2015 303.2015