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An automobile manufacturer claims that its jeep has a53.2 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this

An automobile manufacturer claims that its jeep has a53.2 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep since it is believed that the jeep has an incorrect manufacturer's MPG rating. After testing290jeeps, they found a mean MPG of53.4. Assume the standard deviation is known to be2.0. A level of significance of0.1will be used. Make a decision to reject or fail to reject the null hypothesis.

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