(16.25) how heavy a load (pounds) is needed to pull apart pieces of douglas fir 4 inches long and 1.5 inches square? here are data from students doing a laboratory exercise: 27138 26424 29488 28783 35413 31951 26396 25573 28757 26834 26084 29172 28489 33089 31349 26054 25150 28464 27806 25718 we are willing to regard the wood pieces prepared for the lab session as an srs of all similar pieces of douglas fir. suppose that the strength of pieces of wood like these follows a normal distribution with standard deviation 3000 pounds. give a 99% confidence interval for the mean load required to pull the wood apart (give your answer with three decimal places).