The deterioration of many municipal pipeline networks across the country is a gowing conoer technology proposed for pipeline rehabilitation uses a flexible liner threaded through existing pipe article Effect of Welding on a High-Density Polyethylene Liner (J. Mater. Civil Eng the following data on tensile strength (psi) of liner specimens both when a certain and when this process was not used.

No Fusion :: 2748 2700 2655 2822 2511 3149 3257 3213 3220 2753
Yes Fusion :: 3027 3356 3359 3297 3125 2910 2889 2902

Required:
a. Compare the mean tensile strengths at the 95% confidence level.
b. Perform a COMPLETE APPROPRIATE analysis.