1# The cooling system in a nuclear submarine consists of an assembly of welded pipes through which a coolant is cir- culated. Specifications require that weld strength must meet or exceed 150 psi. a) Suppose that the design engineers decide to test the hypothesis Ho: H = why this choice of alternative hypothesis is better than H: p < 150. (b) A random sample of 20 welds results in 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. 150 versus H: > 150. Explain 153.7 psi and %3D

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1#
The cooling system in a nuclear submarine consists
of an assembly of welded pipes through which a coolant is cir-
culated. Specifications require that weld strength must meet or
exceed 150 psi.
(a) Suppose that the design engineers decide to test the
hypothesis Ho: µ = 150 versus H: p > 150. Explain
why this choice of alternative hypothesis is better than
H: p < 150.
(b) A random sample of 20 welds results in = 153.7 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.
Transcribed Image Text:1# The cooling system in a nuclear submarine consists of an assembly of welded pipes through which a coolant is cir- culated. Specifications require that weld strength must meet or exceed 150 psi. (a) Suppose that the design engineers decide to test the hypothesis Ho: µ = 150 versus H: p > 150. Explain why this choice of alternative hypothesis is better than H: p < 150. (b) A random sample of 20 welds results in = 153.7 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.
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