condition mean min max ZT0-3 0.0123432 0.0123432 0.0123432 ZT4-7 0.22275353333333334 0.22275353333333334 0.22275353333333334 ZT8-11 0.006573699999999999 0.006573699999999999 0.006573699999999999 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0