condition mean min max ZT0-3 0.32076701225000004 0.2965680745 0.34496595 ZT4-7 0.5640734439999999 0.4405983725 0.6875485155 ZT8-11 0.48373570525 0.366980888 0.6004905225 ZT12-15 0.09590550125000001 0.042493358 0.1493176445 ZT16-19 0.10222482875 0.05018716299999999 0.1542624945 ZT20-23 0.20785021425 0.18390118649999998 0.231799242