condition mean min max ZT0-3 528.7 528.7 528.7 ZT4-7 3367.8 3367.8 3367.8 ZT8-11 2769.8999999999996 2769.8999999999996 2769.8999999999996 ZT12-15 2380.1499999999996 2380.1499999999996 2380.1499999999996 ZT16-19 829.5 829.5 829.5 ZT20-23 138.5 138.5 138.5