condition mean min max ZT0-3 106.275575 95.23165 117.3195 ZT4-7 83.83275 83.83275 83.83275 ZT8-11 148.3905 148.3905 148.3905 ZT12-15 0 0 0 ZT16-19 203.1165 203.1165 203.1165 ZT20-23 130.734 130.734 130.734