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. Leaker 0.290 0.104 0.207 0.145 0.104 0.124
A) Calculate the sample mean.
B) Calculate the sample standard deviation.
S2 = n infiniy xi2 - (infinity xi)2/n(n-1)