An automobile manufacturer claims that its van has a 52.9 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 180 vans, they found a mean MPG of 53.3. Assume the variance is known to be 5.76. A level of significance of 0.02 will be used. State the hypotheses. Enter the hypotheses:.