A company was experiencing a chronic weld-defect problem with a water-outlet-tube assembly. Each assembly manufactured is leak tested in a water tank. Data were collected on a gap between the flange and the pipe for 6 bad assemblies that leaked and 6 good assemblies that passed the leak test. Leaked 0.290 0.104 0.207 0.145 0.104 0.124 Did not Leak 0.207 0.124 0.062 0.301 0.186 0.124

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A company was experiencing a chronic weld-defect problem with a water-outlet-tube assembly. Each assembly manufactured is leak tested in a water tank. Data were collected on a gap between the flange and the pipe for 6 bad assemblies that leaked and 6 good assemblies that passed the leak test.

Leaked

0.290

0.104

0.207

0.145

0.104

0.124

Did not Leak

0.207

0.124

0.062

0.301

0.186

0.124

 

  1. Calculate the sample mean for both the assemblies that leaked and those that did not.
  2. Calculate the sample standard deviation for both the assemblies that leaked and those that did not.
  3. Does there appear to be a major difference in gap between assemblies that leaked and those that did not?
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