condition mean min max ZT0-3 8.98684356575 7.8319393815 10.14174775 ZT4-7 5.962808262749999 5.2713474425 6.654269082999999 ZT8-11 7.997127383 6.496605161 9.497649605 ZT12-15 8.739245247 8.0991769975 9.3793134965 ZT16-19 6.3905441955 4.8235110274999995 7.9575773635000004 ZT20-23 4.1890169010000005 3.9881085855 4.3899252165