condition mean min max ZT0-3 0.43379999999999996 0.43379999999999996 0.43379999999999996 ZT4-7 0.446938 0.446938 0.446938 ZT8-11 0.835585 0.835585 0.835585 ZT12-15 0.867652 0.867652 0.867652 ZT16-19 1.6069499999999999 1.6069499999999999 1.6069499999999999 ZT20-23 0.5583935 0.5583935 0.5583935