An automobile manufacturer has given its car a 36.6 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the actual MPG for this car since it is believed that the car performs over the manufacturer's MPG rating. After testing 170 cars, they found a mean MPG of 36.7. Assume the population standard deviation is known to be 2.3. Is there sufficient evidence at the 0.1 level to support the testing firm's claim? Step 2 of 6 : Find the value of the test statistic. Round your answer to two decimal places.
Added by Lindsey C.
Step 1
Null hypothesis (H0): The car's actual MPG is equal to the manufacturer's rating, i.e., μ = 36.6. Alternative hypothesis (H1): The car's actual MPG is greater than the manufacturer's rating, i.e., μ > 36.6. Show more…
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