3. A car manufacturer claims that a new model Q has an average fuel efficiency =...
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3. A car manufacturer claims that a new model Q has an average fuel efficiency µ = 35 miles per gallon on the highway, and a standard deviation σ = 5. The American Automobile Association randomly selected 40 new Qs and measured their fuel efficiency at 33 miles per gallon. Was the car manufacturer truthful in advertising Q’s fuel efficiency as being 35 miles per gallon, assuming α = .10?
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