In the past a machine has produced washers having a mean thickness of 0.050 inch. To determine whether the machine is in proper working order a sample of 10 washers is chosen for which the mean...

Extracted text: In the past a machine has produced washers having a mean thickness of 0.050 inch. To determine whether the machine is in proper working order a sample of 10 washers is chosen for which the mean thickness is 0.053 inch and the standard deviation is 0.003 inch. Find the Critical value (C.V) for a = 0.05 O a. C.V= 2.262 O b. C.V=1.833 O c. C.V=2.228 O d. C.V=1.812 O e. None of these.