condition mean min max ZT0-3 58.6109 58.6109 58.6109 ZT4-7 32.955650000000006 32.955650000000006 32.955650000000006 ZT8-11 30.007550000000002 30.007550000000002 30.007550000000002 ZT12-15 55.57985 55.57985 55.57985 ZT16-19 56.4906 56.4906 56.4906 ZT20-23 69.9608 69.9608 69.9608