condition mean min max ZT0-3 0.9114215 0.8217995 0.9864219999999999 ZT4-7 0.2633135 0.2633135 0.2633135 ZT8-11 0.0605473 0.0605473 0.0605473 ZT12-15 0.031880925 0.03023665 0.0335252 ZT16-19 0.11398035 0.11398035 0.11398035 ZT20-23 0.39170150000000004 0.39170150000000004 0.39170150000000004