condition mean min max ZT0-3 0.04030188333333334 0.04030188333333334 0.04030188333333334 ZT4-7 0.027506 0.027506 0.027506 ZT8-11 0.016303825 0.016303825 0.016303825 ZT12-15 0.016567474999999998 0.016567474999999998 0.016567474999999998 ZT16-19 0.03054845 0.03054845 0.03054845 ZT20-23 0.0 0.0 0.0