Engine parts Here are measurements (in millimeters) of a
Chapter , Problem R8.8(choose chapter or problem)
Engine parts Here are measurements (in millimeters) of a critical dimension on an SRS of 16 of the more than 200 auto engine crankshafts produced in one day: 224.120 224.001 224.017 223.982 223.989 223.961 223.960 224.089 223.987 223.976 223.902 223.980 224.098 224.057 223.913 223.999 (a) Construct and interpret a 95% confidence interval for the process mean at the time these crankshafts were produced. (b) The process mean is supposed to be M ? 224 mm but can drift away from this target during production. Does your interval from part (a) suggest that the process mean has drifted? Explain. s Determine the sample size required to obtain a level C confidence interval for a population mean with a specified margin of error.
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