condition mean min max ZT0-3 11.108500000000001 11.108500000000001 11.108500000000001 ZT4-7 11.49925 11.49925 11.49925 ZT8-11 9.797365 9.797365 9.797365 ZT12-15 9.59885 9.59885 9.59885 ZT16-19 9.22141 9.22141 9.22141 ZT20-23 10.201253333333332 10.201253333333332 10.201253333333332