STATE: How heavy a load (in pounds) is needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Data from students doing a laboratory exercise are given. Weight of Load (lbs) 31,860 33,020 30,930 30,170 33,190 32,320 23,040 24,050 lower bound: To access the data, click the link for your preferred software format. CSV Excel (xls) Excel (xlsx) JMP Mac-Text Minitab14-18 Minitab18+ PC-Text R SPSS TI CrunchIt! upper bound: PLAN: We will estimate u by giving a 98% confidence interval. SOLVE: Give a 98% confidence interval for the mean load required to pull apart the wood. Suppose that the strength of pieces of wood like these follows a Normal distribution with standard deviation 3000 pounds. Give your answers to two decimal places. 29112.97 32,590 32,030 32,720 31,300 Incorrect 26,520 30,460 33,650 28,730 Incorrect 33,280 32,700 32,340 31,920

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