An automobile inanutacturer dwm that their van has a 39 mies/gatlion (MPG) rating. An independent testing firm has been contracted to test the MPG for this van. Nier testas 14 vans thicy found a mean MpG of 38.8 with a standard deviation at 22MPG. Is there sufficient evidence at the 0.1 level that the vans have an incorrect. manutacturels MPG rating? geate the nuit and afterngive byoothertes for the above sechario Answer.