condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0033684897499999997 0.0 0.0067369794999999994 ZT16-19 0.01630258925 0.0 0.0326051785 ZT20-23 0.00429957975 0.0 0.0085991595