condition mean min max ZT0-3 3.1957312499999997 1.0602274999999999 5.3312349999999995 ZT4-7 1.8303695 1.8303695 1.8303695 ZT8-11 0.27871250000000003 0.27871250000000003 0.27871250000000003 ZT12-15 0 0 0 ZT16-19 1.6328049999999998 1.6328049999999998 1.6328049999999998 ZT20-23 2.55017 2.55017 2.55017