condition mean min max ZT0-3 0.33391800000000005 0.0696435 0.64822 ZT4-7 0.0619173 0.0619173 0.0619173 ZT8-11 0.351614 0.351614 0.351614 ZT12-15 0.7140837499999999 0.540949 0.8872184999999999 ZT16-19 0.5810545 0.5810545 0.5810545 ZT20-23 0.5868415 0.5868415 0.5868415