condition mean min max ZT0-3 141.746577 141.746577 141.746577 ZT4-7 137.28554200000002 137.28554200000002 137.28554200000002 ZT8-11 149.4991225 149.4991225 149.4991225 ZT12-15 158.3171165 158.3171165 158.3171165 ZT16-19 245.09914400000002 245.09914400000002 245.09914400000002 ZT20-23 211.84684550000003 211.84684550000003 211.84684550000003