According to the article Fatigue Testing of Condoms(Polymer Testing, 2009: 567571)
Chapter 7, Problem 32(choose chapter or problem)
According to the article Fatigue Testing of Condoms(Polymer Testing, 2009: 567571), tests currently used for condoms are surrogates for the challenges they face in use,including a test for holes, an inflation test, a package seal test,and tests of dimensions and lubricant quality (all fertile territoryfor the use of statistical methodology!). The investigatorsdeveloped a new test that adds cyclic strain to a level wellbelow breakage and determines the number of cycles tobreak. A sample of 20 condoms of one particular typeresulted in a sample mean number of 1584 and a sample standarddeviation of 607. Calculate and interpret a confidenceinterval at the 99% confidence level for the true average numberof cycles to break. [Note: The article presented the resultsof hypothesis tests based on the t distribution; the validity ofthese depends on assuming normal population distributions.]
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