Click to open: As part of a larger project to study the behavior of stressed-skin panels, a structural component being used extensively in North America, an article reported on various mechanical properties of Scotch pine lumber specimens. Data on the modulus of elasticity (MPa) obtained 1 minute after loading in a certain configuration and 4 weeks after loading for the same lumber specimens is presented here. Observation 1 min 4 weeks Difference 1 10,440 9,150 1290 2 16,620 13,250 3370 3 17,500 14,720 2780 4 15,480 12,730 2750 5 12,980 10,120 2860 6 17,260 14,570 2690 Calculate an upper confidence bound for the true average difference between 1-minute modulus and 4-week modulus (Use a 0.05. Round your answer to two decimal places.).