condition mean min max ZT0-3 160.99845 160.99845 160.99845 ZT4-7 179.188705 179.188705 179.188705 ZT8-11 172.0564085 172.0564085 172.0564085 ZT12-15 162.7852255 162.7852255 162.7852255 ZT16-19 163.53551099999999 163.53551099999999 163.53551099999999 ZT20-23 158.256427 158.256427 158.256427