Mathematics, 12.08.2021 23:40 colebuug9

An automobile manufacturer claims that their van has a 40.3 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van. After testing 190 vans, they found a mean MPG of 51.4. Assume the population standard deviation is known to be 1.7. Required:
Is there sufficient evidence at the 0.05 level to support the testing firm's claim

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An automobile manufacturer claims that their van has a 40.3 miles/gallon (MPG) rating. An independen...

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