The cooling system in a nuclear submarine consists of an assembly of welded pipes
Chapter 9, Problem 9-130(choose chapter or problem)
The cooling system in a nuclear submarine consists of an assembly of welded pipes through which a coolant is circulated. Specifications require that weld strength must meet or exceed 150 psi. (a) Suppose that the design engineers decide to test the hypothesis H0: 150 versus H1: 150. Explain why this choice of alternative hypothesis is better than H1: 150. (b) A random sample of 20 welds results in psi and s 11.3 psi. What conclusions can you draw about the hypothesis in part (a)? State any necessary assumptions about the underlying distribution of the data. 9-
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