condition mean min max ZT0-3 929.0999999999999 929.0999999999999 929.0999999999999 ZT4-7 360.2 360.2 360.2 ZT8-11 418.90000000000003 418.90000000000003 418.90000000000003 ZT12-15 430.5 430.5 430.5 ZT16-19 549.0999999999999 549.0999999999999 549.0999999999999 ZT20-23 852.7 852.7 852.7