condition mean min max ZT0-3 144.376194 144.376194 144.376194 ZT4-7 66.6979635 66.6979635 66.6979635 ZT8-11 59.595217 59.595217 59.595217 ZT12-15 78.6020175 78.6020175 78.6020175 ZT16-19 66.431743 66.431743 66.431743 ZT20-23 57.376217999999994 57.376217999999994 57.376217999999994