condition mean min max ZT0-3 158.264742 158.264742 158.264742 ZT4-7 86.34715249999999 86.34715249999999 86.34715249999999 ZT8-11 90.09165899999999 90.09165899999999 90.09165899999999 ZT12-15 125.99050299999999 125.99050299999999 125.99050299999999 ZT16-19 82.281885 82.281885 82.281885 ZT20-23 85.1466355 85.1466355 85.1466355