condition mean min max ZT0-3 241.8245 224.745 258.904 ZT4-7 158.26999999999998 158.26999999999998 158.26999999999998 ZT8-11 193.80200000000002 193.80200000000002 193.80200000000002 ZT12-15 0 0 0 ZT16-19 273.844 273.844 273.844 ZT20-23 244.012 244.012 244.012