condition mean min max ZT0-3 10.6863 10.6863 10.6863 ZT4-7 7.6360600000000005 7.6360600000000005 7.6360600000000005 ZT8-11 6.73279 6.73279 6.73279 ZT12-15 7.4580850000000005 7.4580850000000005 7.4580850000000005 ZT16-19 10.46104 10.46104 10.46104 ZT20-23 9.635404999999999 9.635404999999999 9.635404999999999