Question

The white wood material used for the roof of an ancient temple is imported from a certain country. The wooden roof must withstand as much as 100 centimeters of snow in the winter. Architects at a university conducted a study to estimate the mean bending strength of the white wood roof. A sample of 25 pieces of the imported wood were tested and yielded the statistics x=77.1 and s=8.5 on breaking strength​ (MPa). Estimate the true mean breaking strength of the white wood with a 99 %confidence interval. Interpret the result. Find the 99 % confidence interval for the true mean breaking strength of the white wood.

Answer 1