condition mean min max ZT0-3 0.81754625375 0.71110065 0.9239918575 ZT4-7 0.61455667725 0.555099363 0.6740139915000001 ZT8-11 0.6685651012499999 0.5394835419999999 0.7976466604999999 ZT12-15 1.50083997575 1.1597128204999998 1.841967131 ZT16-19 2.39356383125 1.8315758115 2.955551851 ZT20-23 4.723488402999999 3.6779326725 5.7690441335