condition mean min max ZT0-3 31.832768037499996 28.68784319 34.977692884999996 ZT4-7 26.54565671 25.71536917 27.37594425 ZT8-11 24.62856728166667 23.983552343333333 25.27358222 ZT12-15 24.109246485 22.220816306666666 25.997676663333333 ZT16-19 30.720814691666668 29.57482662 31.866802763333332 ZT20-23 30.44414777 29.916925600000003 30.97136994