condition mean min max ZT0-3 94.813697 94.813697 94.813697 ZT4-7 77.1363435 77.1363435 77.1363435 ZT8-11 105.03656649999999 105.03656649999999 105.03656649999999 ZT12-15 85.7517615 85.7517615 85.7517615 ZT16-19 85.6784995 85.6784995 85.6784995 ZT20-23 106.618815 106.618815 106.618815