condition mean min max ZT0-3 11.2672 11.2672 11.2672 ZT4-7 11.0783 11.0783 11.0783 ZT8-11 5.98951 5.98951 5.98951 ZT12-15 9.927579999999999 9.927579999999999 9.927579999999999 ZT16-19 10.548649999999999 10.548649999999999 10.548649999999999 ZT20-23 12.4056 12.4056 12.4056