condition mean min max ZT0-3 0.14010161666666665 0.10564299999999999 0.19845200000000002 ZT4-7 0.1906555 0.1906555 0.1906555 ZT8-11 0.03925555 0.03925555 0.03925555 ZT12-15 0.061470775000000005 0.05632865 0.0666129 ZT16-19 0.12363004999999999 0.12363004999999999 0.12363004999999999 ZT20-23 0.3377255 0.3377255 0.3377255