condition mean min max ZT0-3 2722.8999999999996 2722.8999999999996 2722.8999999999996 ZT4-7 2929.5 2929.5 2929.5 ZT8-11 2718.95 2718.95 2718.95 ZT12-15 2117.05 2117.05 2117.05 ZT16-19 2213.3 2213.3 2213.3 ZT20-23 2485.5 2485.5 2485.5