condition mean min max ZT0-3 0.31677749099999997 0.206756867 0.426798115 ZT4-7 0.4104739823333333 0.23545312766666665 0.5854948369999999 ZT8-11 0.284459793 0.273388917 0.295530669 ZT12-15 0.27814985600000003 0.254399515 0.30190019700000004 ZT16-19 0.6590100105000001 0.461187059 0.856832962 ZT20-23 0.4189048496666667 0.33959545533333335 0.49821424400000003