condition mean min max ZT0-3 104.952079 104.952079 104.952079 ZT4-7 165.67507799999998 165.67507799999998 165.67507799999998 ZT8-11 370.57547950000003 370.57547950000003 370.57547950000003 ZT12-15 409.4182525 409.4182525 409.4182525 ZT16-19 831.6704795 831.6704795 831.6704795 ZT20-23 707.521937 707.521937 707.521937