A Consumer Group Plans to Test Whether a New Passenger

question 76

Multiple Choice

A consumer group plans to test whether a new passenger car that is advertised to have a mean highway miles per gallon of at least 33 actually meets this level. They plan to test the hypothesis using a significance level of 0.05 and a sample size of n = 100 cars. It is believed that the population standard deviation is 3 mpg. Based upon this information, if the "true" population mean is 32.0 mpg, what is the probability that the test will lead the consumer group to reject the claimed mileage for this car?

• A) About 0.075
• B) Approximately 0.95
• C) 0.05
• D) None of the above

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