condition mean min max ZT0-3 0.03325195 0.03325195 0.03325195 ZT4-7 0.01105115 0.01105115 0.01105115 ZT8-11 0.0628355 0.0628355 0.0628355 ZT12-15 0.03994525 0.03994525 0.03994525 ZT16-19 0.057485549999999996 0.057485549999999996 0.057485549999999996 ZT20-23 0.033443749999999994 0.033443749999999994 0.033443749999999994