condition mean min max ZT0-3 0.64090732375 0.6343143944999999 0.647500253 ZT4-7 0.24332054575 0.035888163 0.45075292850000004 ZT8-11 0.07299366424999999 0.04560720099999999 0.1003801275 ZT12-15 17.17923513125 15.4236307025 18.93483956 ZT16-19 15.91255092175 12.7156733535 19.10942849 ZT20-23 7.026305525250001 6.690139559 7.3624714915