condition mean min max ZT0-3 0.10584474999999999 0.0 0.21168949999999997 ZT4-7 0.059587 0.059587 0.059587 ZT8-11 0.0307603 0.0307603 0.0307603 ZT12-15 0 0 0 ZT16-19 0.0297954 0.0297954 0.0297954 ZT20-23 0.030012 0.030012 0.030012