condition mean min max ZT0-3 0.015139775 0.015139775 0.015139775 ZT4-7 0.0113127 0.0113127 0.0113127 ZT8-11 0.0061398749999999995 0.0061398749999999995 0.0061398749999999995 ZT12-15 0.035400658333333335 0.035400658333333335 0.035400658333333335 ZT16-19 0.059203149999999996 0.059203149999999996 0.059203149999999996 ZT20-23 0.035696875 0.035696875 0.035696875