condition mean min max ZT0-3 0.74459671575 0.47736095100000003 1.0118324804999999 ZT4-7 1.39020690625 1.1531832025 1.62723061 ZT8-11 1.147749538 1.077849225 1.217649851 ZT12-15 1.310105298 1.0014309825 1.6187796135 ZT16-19 1.6513462595000001 1.4216510885 1.8810414305000003 ZT20-23 3.885878937 2.897662436 4.874095438