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QUESTION
"A machine that produces metal rods used in an automobile suspension system is being tested to make sure that the average diameter of rods it...
"A machine that produces metal rods used in an automobile suspension system is being tested to make sure that the average diameter of rods it produces does not exceed 8.20mm. A random sample of 15 rods is selected, and the diameter (in mm) is measured for each rod. The resulting data are shown below."
