condition mean min max ZT0-3 0.5846223333333334 0.0 1.2917015 ZT4-7 0.3445585 0.3445585 0.3445585 ZT8-11 0.5951735 0.5951735 0.5951735 ZT12-15 0.49413399999999996 0.3576325 0.6306354999999999 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0