condition mean min max ZT0-3 5.235632310500001 4.770149740000001 5.7011148810000005 ZT4-7 4.045700043 3.5870419595 4.5043581265 ZT8-11 5.13301275175 4.741186632 5.5248388715 ZT12-15 6.762701986500001 5.309396055500001 8.2160079175 ZT16-19 5.9635718965 5.3606593915000005 6.5664844015 ZT20-23 9.695476994749999 8.7586200195 10.63233397