condition mean min max ZT0-3 120.734275 105.70855 135.76 ZT4-7 72.60325 72.60325 72.60325 ZT8-11 80.28280000000001 80.28280000000001 80.28280000000001 ZT12-15 0 0 0 ZT16-19 94.3023 94.3023 94.3023 ZT20-23 102.20965000000001 102.20965000000001 102.20965000000001